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reorientation</title> <meta name="description" content="Search results for: spin reorientation"> <meta name="keywords" content="spin reorientation"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="spin reorientation"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 319</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: spin reorientation</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">319</span> An Implementation of a Dual-Spin Spacecraft Attitude Reorientation Using Properties of Its Chaotic Motion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anton%20V.%20Doroshin">Anton V. Doroshin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article contains a description of main ideas for the attitude reorientation of spacecraft (small dual-spin spacecraft, nanosatellites) using properties of its chaotic attitude motion under the action of internal perturbations. The considering method based on intentional initiations of chaotic modes of attitude motion with big amplitudes of the nutation oscillations, and also on the redistributions of the angular momentum between coaxial bodies of the dual-spin spacecraft (DSSC), which perform in the purpose of system’s phase space changing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spacecraft" title="spacecraft">spacecraft</a>, <a href="https://publications.waset.org/abstracts/search?q=attitude%20dynamics" title=" attitude dynamics"> attitude dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=control" title=" control"> control</a>, <a href="https://publications.waset.org/abstracts/search?q=chaos" title=" chaos"> chaos</a> </p> <a href="https://publications.waset.org/abstracts/3503/an-implementation-of-a-dual-spin-spacecraft-attitude-reorientation-using-properties-of-its-chaotic-motion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3503.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">397</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">318</span> Path-Spin to Spin-Spin Hybrid Quantum Entanglement: A Conversion Protocol</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Indranil%20Bayal">Indranil Bayal</a>, <a href="https://publications.waset.org/abstracts/search?q=Pradipta%20Panchadhyayee"> Pradipta Panchadhyayee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Path-spin hybrid entanglement generated and confined in a single spin-1/2 particle is converted to spin-spin hybrid interparticle entanglement, which finds its important applications in quantum information processing. This protocol uses beam splitter, spin flipper, spin measurement, classical channel, unitary transformations, etc., and requires no collective operation on the pair of particles whose spin variables share complete entanglement after the accomplishment of the protocol. The specialty of the protocol lies in the fact that the path-spin entanglement is transferred between spin degrees of freedom of two separate particles initially possessed by a single party. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=entanglement" title="entanglement">entanglement</a>, <a href="https://publications.waset.org/abstracts/search?q=path-spin%20entanglement" title=" path-spin entanglement"> path-spin entanglement</a>, <a href="https://publications.waset.org/abstracts/search?q=spin-spin%20entanglement" title=" spin-spin entanglement"> spin-spin entanglement</a>, <a href="https://publications.waset.org/abstracts/search?q=CNOT%20operation" title=" CNOT operation"> CNOT operation</a> </p> <a href="https://publications.waset.org/abstracts/142538/path-spin-to-spin-spin-hybrid-quantum-entanglement-a-conversion-protocol" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142538.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">198</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">317</span> Exploring Spin Reorientation Transition and Berry Curvature Driven Anomalous Hall Effect in Quasi-2D vdW Ferromagnet Fe4GeTe2</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Satyabrata%20Bera">Satyabrata Bera</a>, <a href="https://publications.waset.org/abstracts/search?q=Mintu%20Mondal"> Mintu Mondal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Two-dimensional (2D) ferromagnetic materials have garnered significant attention due to their potential to host intriguing scientific phenomena such as the anomalous Hall effect, anomalous Nernst effect, and high transport spin polarization. This study focuses on the investigation of air-stable van der Waals(vdW) ferromagnets, FeGeTe₂ (FₙGT with n = 3, 4, and 5). Particular emphasis is placed on the Fe4GeTe2 (F4GT) compound, which exhibits a complex and fascinating magnetic behavior characterized by two distinct transitions: (i) paramagnetic (PM) to ferromagnetic (FM) around T C ∼ 270 K, and (ii) another spins reorientation transition (SRT) at T SRT ∼ 100 K . Scaling analysis of magnetocaloric effect confirms the second-order character of the ferromagnetic transition, while the same analysis at T SRT suggests that SRT is first-order phase transition. Moreover, the F4GT exhibits a large anomalous Hall conductivity (AHC), ∼ 490 S/cm at 2 K . The near-quadratic behavior of the anomalous Hall resistivity with the longitudinal resistivity suggests that a dominant AHC contribution arises from an intrinsic Berry curvature (BC) mechanism. Electronic structure calculations reveal a significant BC resulting from SOC-induced gapped nodal lines around the Fermi level, thereby giving rise to large AHC. Additionally, we reported exceptionally large anomalous Hall angle (≃ 10.6%) and Hall factor (≃ 0.22 V −1 ) values, the largest observed within this vdW family. The findings presented here, provide valuable insights into the fascinating magnetic and transport properties of 2D ferromagnetic materials, in particular, FₙGT family. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=2D%20vdW%20ferromagnet" title="2D vdW ferromagnet">2D vdW ferromagnet</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20reorientation%20transition" title=" spin reorientation transition"> spin reorientation transition</a>, <a href="https://publications.waset.org/abstracts/search?q=anomalous%20hall%20effect" title=" anomalous hall effect"> anomalous hall effect</a>, <a href="https://publications.waset.org/abstracts/search?q=berry%20curvature" title=" berry curvature"> berry curvature</a> </p> <a href="https://publications.waset.org/abstracts/178827/exploring-spin-reorientation-transition-and-berry-curvature-driven-anomalous-hall-effect-in-quasi-2d-vdw-ferromagnet-fe4gete2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/178827.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">86</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">316</span> Evaluating the Effect of Structural Reorientation to Thermochemical and Energetic Properties of 1,4-Diamino-3,6-Dinitropyrazolo[4,3- C]Pyrazole</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lamla%20Thungathaa">Lamla Thungathaa</a>, <a href="https://publications.waset.org/abstracts/search?q=Conrad%20Mahlasea"> Conrad Mahlasea</a>, <a href="https://publications.waset.org/abstracts/search?q=Lisa%20Ngcebesha"> Lisa Ngcebesha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> 1,4-Diamino-3,6-dinitropyrazolo[4,3-c]pyrazole (LLM-119) and its structural isomer 3,6-dinitropyrazolo[3,4-c]pyrazole-1,4(6H)-diamine were designed by structural reorientation of the fused pyrazole rings and their respective substituents (-NO2 and -NH2). Structural reorientation involves structural rearrangement which result in different structural isomers, employing this approach, six structural isomers of LLM-119 were achieved. The effect of structural reorientation (isomerisation and derivatives) on the enthalpy of formation, detonation properties, impact sensitivity, and density of these molecules is studied Computationally. The computational method used are detailed in the document and they yielded results that are close to the literature values with a relative error of 2% for enthalpy of formation, 2% for density, 0.05% for detonation velocity, and 4% for detonation pressure. The correlation of the structural reorientation to the calculated thermochemical and detonation properties of the molecules indicated that molecules with a -NO2 group attached to a Carbon atom and -NH2 connected to a Nitrogen atom maximize the enthalpy of formation and detonation velocity. The joining of pyrazole molecules has less effect on these parameters. It was seen that density and detonation pressure improved when both –NO2 or -NH2 functional groups were on the same side of the molecular structure. The structural reorientation gave rise to 3,4-dinitropyrazolo[3,4-c]pyrazole-1,6-diamine which exhibited optimal density and detonation performance compared to other molecules. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LLM-119" title="LLM-119">LLM-119</a>, <a href="https://publications.waset.org/abstracts/search?q=fused%20rings" title=" fused rings"> fused rings</a>, <a href="https://publications.waset.org/abstracts/search?q=azole" title=" azole"> azole</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20isomers" title=" structural isomers"> structural isomers</a>, <a href="https://publications.waset.org/abstracts/search?q=detonation%20properties" title=" detonation properties"> detonation properties</a> </p> <a href="https://publications.waset.org/abstracts/166859/evaluating-the-effect-of-structural-reorientation-to-thermochemical-and-energetic-properties-of-14-diamino-36-dinitropyrazolo43-cpyrazole" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166859.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">92</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">315</span> Magnetic Structure and Transitions in 45% Mn Substituted HoFeO₃: A Neutron Diffraction Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karthika%20Chandran">Karthika Chandran</a>, <a href="https://publications.waset.org/abstracts/search?q=Pulkit%20Prakash"> Pulkit Prakash</a>, <a href="https://publications.waset.org/abstracts/search?q=Amitabh%20Das"> Amitabh Das</a>, <a href="https://publications.waset.org/abstracts/search?q=Santhosh%20P.%20N."> Santhosh P. N.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Rare earth orthoferrites (RFeO₃) exhibit interesting and useful magnetic properties like multiferroicity, magnetodielectric coupling, spin reorientation (SR) and exchange bias. B site doped RFeO₃ are attracting attention due to the complex and tuneable magnetic transitions. In this work, 45% Mn-doped HoFeO₃ polycrystalline sample (HoFe₀.₅₅Mn₀.₄₅O₃) was synthesized by a solid-state reaction method. The magnetic structure and transitions were studied by magnetization measurements and neutron powder diffraction methods. The neutron diffraction patterns were taken at 13 different temperatures from 7°K to 300°K (7°K and 25°K to 300°K in 25°K intervals). The Rietveld refinement was carried out by using a FULLPROF suite. The magnetic space groups and the irreducible representations were obtained by SARAh module. The room temperature neutron diffraction refinement results indicate that the sample crystallizes in an orthorhombic perovskite structure with Pnma space group with lattice parameters a = 5.6626(3) Ǻ, b = 7.5241(3) Ǻ and c = 5.2704(2) Ǻ. The temperature dependent magnetization (M-T) studies indicate the presence of two magnetic transitions in the system ( TN Fe/Mn~330°K and TSR Fe/Mn ~290°K). The inverse susceptibility vs. temperature curve shows a linear behavior above 330°K. The Curie-Weiss fit in this region gives negative Curie constant (-34.9°K) indicating the antiferromagnetic nature of the transition. The neutron diffraction refinement results indicate the presence of mixed magnetic phases Γ₄(AₓFᵧG <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neutron%20powder%20diffraction" title="neutron powder diffraction">neutron powder diffraction</a>, <a href="https://publications.waset.org/abstracts/search?q=rare%20earth%20orthoferrites" title=" rare earth orthoferrites"> rare earth orthoferrites</a>, <a href="https://publications.waset.org/abstracts/search?q=Rietveld%20analysis" title=" Rietveld analysis"> Rietveld analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20reorientation" title=" spin reorientation"> spin reorientation</a> </p> <a href="https://publications.waset.org/abstracts/105883/magnetic-structure-and-transitions-in-45-mn-substituted-hofeo3-a-neutron-diffraction-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105883.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">314</span> Spin Resolved Electronic Behavior of Zno Nanoribbons </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Serkan%20Caliskan">Serkan Caliskan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study is to understand the spin-resolved properties of ZnO armchair and zigzag nanoribbons. The spin polarization can be induced by either geometry of the nanoribbons or ferromagnetic electrodes. Hence, spin-dependent behavior is revealed in these nanostructures in the absence of external magnetic field. Both electronic structure and magnetic properties of the nanoribbons are analyzed, employing first-principles calculations through Density Functional Theory. The relevant properties using the spin-dependent band structure, conductance, transmission, density of states and magnetic moment are elucidated. These results can be utilized to describe the nanoscale structures and stimulate the experimental works. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=first%20principles" title="first principles">first principles</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20polarized%20transport" title=" spin polarized transport"> spin polarized transport</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO%20device" title=" ZnO device"> ZnO device</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO%20nanoribbons" title=" ZnO nanoribbons"> ZnO nanoribbons</a> </p> <a href="https://publications.waset.org/abstracts/82373/spin-resolved-electronic-behavior-of-zno-nanoribbons" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82373.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">194</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">313</span> Spin-Dependent Transport Signatures of Bound States: From Finger to Top Gates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yun-Hsuan%20Yu">Yun-Hsuan Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chi-Shung%20Tang"> Chi-Shung Tang</a>, <a href="https://publications.waset.org/abstracts/search?q=Nzar%20Rauf%20Abdullah"> Nzar Rauf Abdullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Vidar%20Gudmundsson"> Vidar Gudmundsson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spin-orbit gap feature in energy dispersion of one-dimensional devices is revealed via strong spin-orbit interaction (SOI) effects under Zeeman field. We describe the utilization of a finger-gate or a top-gate to control the spin-dependent transport characteristics in the SOI-Zeeman influenced split-gate devices by means of a generalized spin-mixed propagation matrix method. For the finger-gate system, we find a bound state in continuum for incident electrons within the ultra-low energy regime. For the top-gate system, we observe more bound-state features in conductance associated with the formation of spin-associated hole-like or electron-like quasi-bound states around band thresholds, as well as hole bound states around the reverse point of the energy dispersion. We demonstrate that the spin-dependent transport behavior of a top-gate system is similar to that of a finger-gate system only if the top-gate length is less than the effective Fermi wavelength. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spin-orbit" title="spin-orbit">spin-orbit</a>, <a href="https://publications.waset.org/abstracts/search?q=zeeman" title=" zeeman"> zeeman</a>, <a href="https://publications.waset.org/abstracts/search?q=top-gate" title=" top-gate"> top-gate</a>, <a href="https://publications.waset.org/abstracts/search?q=finger-gate" title=" finger-gate"> finger-gate</a>, <a href="https://publications.waset.org/abstracts/search?q=bound%20state" title=" bound state"> bound state</a> </p> <a href="https://publications.waset.org/abstracts/82686/spin-dependent-transport-signatures-of-bound-states-from-finger-to-top-gates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82686.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">269</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">312</span> Electron Spin Resonance of Conduction and Spin Waves Dynamics Investigations in Bi-2223 Superconductor for Decoding Pairing Mechanism</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20N.%20Ekbote">S. N. Ekbote</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20K.%20Padam"> G. K. Padam</a>, <a href="https://publications.waset.org/abstracts/search?q=Manju%20Arora"> Manju Arora</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electron spin resonance (ESR) spectroscopic investigations of (Bi, Pb)₂Sr₂Ca₂Cu₃O₁₀₋ₓ (Bi-2223) bulk samples were carried out in both the normal and superconducting states. A broad asymmetric resonance signal with side signals is obtained in the normal state, and all of them disappear in the superconducting state. The temperature and angular orientation effects on these signals suggest that the broad asymmetric signal arises from electron spin resonance of conduction electrons (CESR) and the side signals from exchange interactions as Platzman-Wolff type spin waves. The disappearance of CESR and spin waves in a superconducting state demonstrates the role of exchange interactions in Cooper pair formation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bi-2223%20superconductor" title="Bi-2223 superconductor">Bi-2223 superconductor</a>, <a href="https://publications.waset.org/abstracts/search?q=CESR" title=" CESR"> CESR</a>, <a href="https://publications.waset.org/abstracts/search?q=ESR" title=" ESR"> ESR</a>, <a href="https://publications.waset.org/abstracts/search?q=exchange%20interactions" title=" exchange interactions"> exchange interactions</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20waves" title=" spin waves"> spin waves</a> </p> <a href="https://publications.waset.org/abstracts/157103/electron-spin-resonance-of-conduction-and-spin-waves-dynamics-investigations-in-bi-2223-superconductor-for-decoding-pairing-mechanism" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157103.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">131</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">311</span> Morphotropic Phase Boundary in Ferromagnets: Unusual Magnetoelastic Behavior In Tb₁₋ₓNdₓCo₂</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adil%20Murtaza">Adil Murtaza</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Tahir%20Khan"> Muhammad Tahir Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=Awais%20Ghani"> Awais Ghani</a>, <a href="https://publications.waset.org/abstracts/search?q=Chao%20Zhou"> Chao Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=Sen%20Yang"> Sen Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiaoping%20Song"> Xiaoping Song</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The morphotropic phase boundary (MPB); a boundary between two different crystallographic symmetries in the composition–temperature phase diagram has been widely studied in ferroelectrics and recently has drawn interest in ferromagnets for obtaining enhanced large field-induced strain. At MPB, the system gets a compressed free energy state, which allows the polarization to freely rotate and hence results in a high magnetoelastic response (e.g., high magnetization, low coercivity, and large magnetostriction). Based on the same mechanism, we designed MPB in a ferromagnetic Tb₁₋ₓNdₓCo₂ system. The temperature-dependent magnetization curves showed spin reorientation (SR); which can be explained by a two-sublattice model. Contrary to previously reported MPB involved ferromagnetic systems, the MPB composition of Tb₀.₃₅Nd₀.₆₅Co₂ exhibits a low saturation magnetization (MS), indicating a compensation of the Tb and Nd magnetic moments at MPB. The coercive field (HC) under a low magnetic field and first anisotropy constant (K₁) shows a minimum value at MPB composition of x=0.65. A detailed spin configuration diagram is provided for the Tb₁₋ₓNdₓCo₂ around the composition for the anisotropy compensation; this can guide the development of novel magnetostrictive materials. The anisotropic magnetostriction (λS) first decreased until x=0.8 and then continuously increased in the negative direction with further increase of Nd concentration. In addition, the large ratio between magnetostriction and the absolute values of the first anisotropy constant (λS/K₁) appears at MPB, indicating that Tb₀.₃₅Nd₀.₆₅Co₂ has good magnetostrictive properties. Present work shows an anomalous type of MPB in ferromagnetic materials, revealing that MPB can also lead to a weakening of magnetoelastic behavior as shown in the ferromagnetic Tb₁₋ₓNdₓCo₂ system. Our work shows the universal presence of MPB in ferromagnetic materials and suggests the differences between different ferromagnetic MPB systems that are important for substantial improvement of magnetic and magnetostrictive properties. Based on the results of this study, similar MPB effects might be achieved in other ferroic systems that can be used for technological applications. The finding of magnetic MPB in the ferromagnetic system leads to some important significances. First, it provides a better understanding of the fundamental concept of spin reorientation transitions (SRT) like ferro-ferro transitions are not only reorientation of magnetization but also crystal symmetry change upon magnetic ordering. Second, the flattened free energy corresponding to a low energy barrier for magnetization rotation and enhanced magnetoelastic response near MPB. Third, to attain large magnetostriction with MPB approach two terminal compounds have different easy magnetization directions below Curie temperature Tc in order to accomplish the weakening of magnetization anisotropy at MPB (as in ferroelectrics), thus easing the magnetic domain switching and the lattice distortion difference between two terminal compounds should be large enough, e.g., lattice distortion of R symmetry ˃˃ lattice distortion of T symmetry). So that the MPB composition agrees to a nearly isotropic state along with large ‘net’ lattice distortion, which is revealed in a higher value of magnetostriction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetization" title="magnetization">magnetization</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetostriction" title=" magnetostriction"> magnetostriction</a>, <a href="https://publications.waset.org/abstracts/search?q=morphotropic%20phase%20boundary%20%28MPB%29" title=" morphotropic phase boundary (MPB)"> morphotropic phase boundary (MPB)</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20transition" title=" phase transition"> phase transition</a> </p> <a href="https://publications.waset.org/abstracts/95289/morphotropic-phase-boundary-in-ferromagnets-unusual-magnetoelastic-behavior-in-tb1ndco2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95289.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">310</span> Coexistence of Superconductivity and Spin Density Wave in Ferropnictide Ba₁₋ₓKₓFe₂As₂</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tadesse%20Desta%20Gidey">Tadesse Desta Gidey</a>, <a href="https://publications.waset.org/abstracts/search?q=Gebregziabher%20Kahsay"> Gebregziabher Kahsay</a>, <a href="https://publications.waset.org/abstracts/search?q=Pooran%20Singh"> Pooran Singh </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work focuses on the theoretical investigation of the coexistence of superconductivity and Spin Density Wave (SDW)in Ferropnictide Ba₁₋ₓKₓFe₂As₂. By developing a model Hamiltonian for the system and by using quantum field theory Green’s function formalism, we have obtained mathematical expressions for superconducting transition temperature TC), spin density wave transition temperature (Tsdw), superconductivity order parameter (Sc), and spin density wave order parameter (sdw). By employing the experimental and theoretical values of the parameters in the obtained expressions, phase diagrams of superconducting transition temperature (TC) versus superconducting order parameter (Sc) and spin density wave transition temperature (Tsdw), versus spin density wave order parameter (sdw) have been plotted. By combining the two phase diagrams, we have demonstrated the possible coexistence of superconductivity and spin density wave (SDW) in ferropnictide Ba1−xKxFe2As2. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Superconductivity" title="Superconductivity">Superconductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=Spin%20density%20wave" title=" Spin density wave"> Spin density wave</a>, <a href="https://publications.waset.org/abstracts/search?q=Coexistence" title=" Coexistence"> Coexistence</a>, <a href="https://publications.waset.org/abstracts/search?q=Green%20function" title=" Green function"> Green function</a>, <a href="https://publications.waset.org/abstracts/search?q=Pnictides" title=" Pnictides"> Pnictides</a>, <a href="https://publications.waset.org/abstracts/search?q=Ba%E2%82%81%E2%82%8B%E2%82%93K%E2%82%93Fe%E2%82%82As%E2%82%82" title=" Ba₁₋ₓKₓFe₂As₂"> Ba₁₋ₓKₓFe₂As₂</a> </p> <a href="https://publications.waset.org/abstracts/119138/coexistence-of-superconductivity-and-spin-density-wave-in-ferropnictide-ba1kfe2as2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/119138.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">173</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">309</span> A Spin and Valley Modulating Device in Grapheme heterostructure: Controlling Valley and Spin Current</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adel%20Belayadi">Adel Belayadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The investigation of two-dimensional (2D) heterostructures, whether in the presence or the absence of magnetic substrates that sustain several induced spin-orbit couplings, has shown a promising/essential application for advancing the emerging fields of spintronics and valleytronics. In this contribution, we study spin/valley transport in graphene-like substrates in the presence of one or several locally induced spin-orbit coupling (SOC) terms resulting from graphene-based heterostructures. The models we proposed are based on the tight-binding approach, and our findings imply an alternative approach for conducting valley-polarized currents and suggest a corresponding mechanism for valley-dependent electron optics and optoelectronic devices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=graphene-heterostructures" title="graphene-heterostructures">graphene-heterostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=tight%20binding%20pproch" title=" tight binding pproch"> tight binding pproch</a>, <a href="https://publications.waset.org/abstracts/search?q=Spintronics" title=" Spintronics"> Spintronics</a>, <a href="https://publications.waset.org/abstracts/search?q=Valleytronics" title=" Valleytronics"> Valleytronics</a> </p> <a href="https://publications.waset.org/abstracts/192032/a-spin-and-valley-modulating-device-in-grapheme-heterostructure-controlling-valley-and-spin-current" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192032.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">25</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">308</span> The Effect of Lande G-Factors on the Quantum and Thermal Entanglement in the Mixed Spin-(1/2,S) Heisenberg Dimer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Vargova">H. Vargova</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Strecka"> J. Strecka</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Tomasovicova"> N. Tomasovicova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A rigorous analytical treatment, with the help of a concept of negativity, is used to study the quantum and thermal entanglement in an isotropic mixed spin-(1/2,S) Heisenberg dimer. The effect of the spin-S magnitude, as well as the effect of diversity between Landé g-factors of magnetic constituents on system entanglement, is exhaustively analyzed upon the variation of the external magnetic and electric field, respectively. It was identified that the increasing magnitude of the spin-S species in a mixed spin-(1/2,S) Heisenberg dimer with comparative Landé g-factors have always a reduction effect on a degree of the quantum entanglement, but it strikingly shifts the thermal entanglement to the higher temperatures. Surprisingly, out of the limit of identical Landé g-factors, the increasing magnitude of spin-S entities can enhance the system entanglement in both low and high magnetic fields. Besides this, we identify that the analyzed dimer with a high-enough magnitude of the spin-S entities at a sufficiently high magnetic field can exhibit unconventional thermally driven re-entrance between the entangled and unentangled mixed state. The importance of the electric-field stimuli is also discussed in detail. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=quantum%20and%20thermal%20entantanglement" title="quantum and thermal entantanglement">quantum and thermal entantanglement</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20spin%20Heisenberg%20model" title=" mixed spin Heisenberg model"> mixed spin Heisenberg model</a>, <a href="https://publications.waset.org/abstracts/search?q=negativity" title=" negativity"> negativity</a>, <a href="https://publications.waset.org/abstracts/search?q=reentrant%20phase%20transition" title=" reentrant phase transition"> reentrant phase transition</a> </p> <a href="https://publications.waset.org/abstracts/155595/the-effect-of-lande-g-factors-on-the-quantum-and-thermal-entanglement-in-the-mixed-spin-12s-heisenberg-dimer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155595.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">99</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">307</span> The Incubation of University Spin-Offs: An Exploratory Study of a Deep Tech Venture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jerome%20D.%20Donovan">Jerome D. Donovan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The pandemic has resulted in a dramatic re-consideration of the reliance on international student fees to support university models in Australia. A key resulting initiative for the Australian Federal Government has been shifting the way universities consider their research model, emphasising the importance of commercialising research. This study specifically examines this shift from the perspective of a university spin-off, examining how university support structures and incubation models have assisted in the translation of fundamental research into a high-growth university spin-off. A focused case study approach is adopted in this study, using an auto-ethnographic research method to document the experiences and insights drawn from being a co-founder in a university spin-off in a time where research commercialisation has emerged as a central focus in Australian universities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=research%20commercialisation" title="research commercialisation">research commercialisation</a>, <a href="https://publications.waset.org/abstracts/search?q=spin-offs" title=" spin-offs"> spin-offs</a>, <a href="https://publications.waset.org/abstracts/search?q=university%20incubation" title=" university incubation"> university incubation</a>, <a href="https://publications.waset.org/abstracts/search?q=entrepreneurship" title=" entrepreneurship"> entrepreneurship</a> </p> <a href="https://publications.waset.org/abstracts/166331/the-incubation-of-university-spin-offs-an-exploratory-study-of-a-deep-tech-venture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166331.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">81</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">306</span> In Search of High Growth: Mapping out Academic Spin-Off´s Performance in Catalonia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Guspi">F. Guspi</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Garc%C3%ADa"> E. García</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This exploratory study gives an overview of the evolution of the main financial and performance indicators of the Academic Spin-Off’s and High Growth Academic Spin-Off’s in year 3 and year 6 after its creation in the region of Catalonia in Spain. The study compares and evaluates results of these different measures of performance and the degree of success of these companies for each University. We found that the average Catalonian Academic Spin-Off is small and have not achieved the sustainability stage at year 6. On the contrary, a small group of High Growth Academic Spin-Off’s exhibit robust performance with high profits in year 6. Our results support the need to increase selectivity and support for these companies especially near year 3, because are the ones that will bring wealth and employment. University role as an investor has rigid norms and habits that impede an efficient economic return from their ASO investment. Universities with high performance on sales and employment in year 3 not always could sustain this growth in year 6 because their ASO’s are not profitable. On the contrary, profitable ASO exhibit superior performance in all measurement indicators in year 6. We advocate the need of a balanced growth (with profits) as a way to obtain subsequent continuous growth. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Academic%20Spin-Off%20%28ASO%29" title="Academic Spin-Off (ASO)">Academic Spin-Off (ASO)</a>, <a href="https://publications.waset.org/abstracts/search?q=university%20entrepreneurship" title=" university entrepreneurship"> university entrepreneurship</a>, <a href="https://publications.waset.org/abstracts/search?q=entrepreneurial%20university" title=" entrepreneurial university"> entrepreneurial university</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20growth" title=" high growth"> high growth</a>, <a href="https://publications.waset.org/abstracts/search?q=New%20Technology%20Based%20Companies%20%28NTBC%29" title=" New Technology Based Companies (NTBC)"> New Technology Based Companies (NTBC)</a>, <a href="https://publications.waset.org/abstracts/search?q=University%20Spin-Off" title=" University Spin-Off "> University Spin-Off </a> </p> <a href="https://publications.waset.org/abstracts/18172/in-search-of-high-growth-mapping-out-academic-spin-offs-performance-in-catalonia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18172.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">458</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">305</span> Field-Free Orbital Hall Current-Induced Deterministic Switching in the MO/Co₇₁Gd₂₉/Ru Structure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zelalem%20Abebe%20Bekele">Zelalem Abebe Bekele</a>, <a href="https://publications.waset.org/abstracts/search?q=Kun%20Lei"> Kun Lei</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiukai%20Lan"> Xiukai Lan</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiangyu%20Liu"> Xiangyu Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Hui%20Wen"> Hui Wen</a>, <a href="https://publications.waset.org/abstracts/search?q=Kaiyou%20Wang"> Kaiyou Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spin-polarized currents offer an efficient means of manipulating the magnetization of a ferromagnetic layer for big data and neuromorphic computing. Research has shown that the orbital Hall effect (OHE) can produce orbital currents, potentially surpassing the counter spin currents induced by the spin Hall effect. However, it’s essential to note that orbital currents alone cannot exert torque directly on a ferromagnetic layer, necessitating a conversion process from orbital to spin currents. Here, we present an efficient method for achieving perpendicularly magnetized spin-orbit torque (SOT) switching by harnessing the localized orbital Hall current generated from a Mo layer within a Mo/CoGd device. Our investigation reveals a remarkable enhancement in the interface-induced planar Hall effect (PHE) within the Mo/CoGd bilayer, resulting in the generation of a z-polarized planar current for manipulating the magnetization of CoGd layer without the need for an in-plane magnetic field. Furthermore, the Mo layer induces out-of-plane orbital current, boosting the in-plane and out-of-plane spin polarization by converting the orbital current into spin current within the dual-property CoGd layer. At the optimal Mo layer thickness, a low critical magnetization switching current density of 2.51×10⁶ A cm⁻² is achieved. This breakthrough opens avenues for all-electrical control energy-efficient magnetization switching through orbital current, advancing the field of spin-orbitronics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spin-orbit%20torque" title="spin-orbit torque">spin-orbit torque</a>, <a href="https://publications.waset.org/abstracts/search?q=orbital%20hall%20effect" title=" orbital hall effect"> orbital hall effect</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20hall%20current" title=" spin hall current"> spin hall current</a>, <a href="https://publications.waset.org/abstracts/search?q=orbital%20hall%20current" title=" orbital hall current"> orbital hall current</a>, <a href="https://publications.waset.org/abstracts/search?q=interface-generated%20planar%20hall%20current" title=" interface-generated planar hall current"> interface-generated planar hall current</a>, <a href="https://publications.waset.org/abstracts/search?q=anisotropic%20magnetoresistance" title=" anisotropic magnetoresistance"> anisotropic magnetoresistance</a> </p> <a href="https://publications.waset.org/abstracts/182198/field-free-orbital-hall-current-induced-deterministic-switching-in-the-moco71gd29ru-structure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182198.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">55</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">304</span> Non-Singular Gravitational Collapse of a Dust Cloud in Einstein-Cartan Theory</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amir%20Hadi%20Ziaie">Amir Hadi Ziaie</a>, <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Hashemi"> Mostafa Hashemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Shahram%20Jalalzadeh"> Shahram Jalalzadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is now known that the end state of the collapse process of a dense star under its own gravity is the formation of a spacetime singularity. This is the spacetime event where the energy density and spacetime curvature diverge, and the classical general relativity breaks down. As we know, a realistic star is composed of fermions so that their spin effects could alter the final fate of the collapse scenario. The underlying theory within which the inclusion of spin effects can be worked out is the Einstein-Cartan theory. In this theory, the spacetime torsion which is defined as a geometrical quantity, is related to an intrinsic angular momentum of fermions (spin). In this work, we study the collapse process of a homogeneous spin fluid in such a framework and show that taking into account the spin effects of the collapsing cloud could prevent the formation of spacetime singularity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gravitational%20collapse" title="gravitational collapse">gravitational collapse</a>, <a href="https://publications.waset.org/abstracts/search?q=einstein-cartan%20theory" title=" einstein-cartan theory"> einstein-cartan theory</a>, <a href="https://publications.waset.org/abstracts/search?q=spacetime%20singularity" title=" spacetime singularity"> spacetime singularity</a>, <a href="https://publications.waset.org/abstracts/search?q=black%20hole%20physics" title=" black hole physics"> black hole physics</a> </p> <a href="https://publications.waset.org/abstracts/50866/non-singular-gravitational-collapse-of-a-dust-cloud-in-einstein-cartan-theory" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50866.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">397</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">303</span> Rashba Spin Orbit Interaction Effect on Multiphoton Optical Transitions in a Quantum Dot for Bioimaging</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pradip%20Kumar%20Jha">Pradip Kumar Jha</a>, <a href="https://publications.waset.org/abstracts/search?q=Manoj%20Kumar"> Manoj Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We demonstrate in this work the effect of Rashba spin orbit interaction on multiphoton optical transitions of a quantum dot in the presence of THz laser field and external static magnetic field. This combination is solved by accurate non-perturbative Floquet theory. Investigations are made for the optical response of intraband transition between the various states of the conduction band with spin flipping. Enhancement and power broadening observed for excited states probabilities with increase of external fields are directly linked to the emission spectra of QD and will be useful for making future bioimaging devices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bioimaging" title="bioimaging">bioimaging</a>, <a href="https://publications.waset.org/abstracts/search?q=multiphoton%20processes" title=" multiphoton processes"> multiphoton processes</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20orbit%20interaction" title=" spin orbit interaction"> spin orbit interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20dot" title=" quantum dot"> quantum dot</a> </p> <a href="https://publications.waset.org/abstracts/43836/rashba-spin-orbit-interaction-effect-on-multiphoton-optical-transitions-in-a-quantum-dot-for-bioimaging" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43836.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">480</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">302</span> Electronic Structure and Optical Properties of YNi₄Si-Type GdNi₅: A Coulomb Corrected Local-Spin Density Approximation Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sapan%20Mohan%20Saini">Sapan Mohan Saini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we report the calculations on the electronic and optical properties of YNi₄Si-type GdNi₅ compound. Calculations are performed using the full-potential augmented plane wave (FPLAPW) method in the framework of density functional theory (DFT). The Coulomb corrected local-spin density approximation (LSDA+U) in the self-interaction correction (SIC) has been used for exchange-correlation potential. Spin polarised calculations of band structure show that several bands cross the Fermi level (EF) reflect the metallic character. Analysis of density of states (DOS) demonstrates that spin up Gd-f states lie around 7.5 eV below EF and spin down Gd-f lie around 4.5 eV above EF. We found Ni-3d states mainly contribute to DOS from -5.0 eV to the EF. Our calculated results of optical conductivity agree well with the experimental data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electronic%20structure" title="electronic structure">electronic structure</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20properties" title=" optical properties"> optical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=FPLAPW%20method" title=" FPLAPW method"> FPLAPW method</a>, <a href="https://publications.waset.org/abstracts/search?q=YNi%E2%82%84Si-type%20GdNi%E2%82%85" title=" YNi₄Si-type GdNi₅"> YNi₄Si-type GdNi₅</a> </p> <a href="https://publications.waset.org/abstracts/107398/electronic-structure-and-optical-properties-of-yni4si-type-gdni5-a-coulomb-corrected-local-spin-density-approximation-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107398.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">171</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">301</span> Experimental Investigation of Performance Anode Side of PEM Fuel Cell with Spin Method Coated with YSZ+SDC</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G%C3%BCrol%20%C3%96nal">Gürol Önal</a>, <a href="https://publications.waset.org/abstracts/search?q=Kevser%20Din%C3%A7er"> Kevser Dinçer</a>, <a href="https://publications.waset.org/abstracts/search?q=Salih%20Yayla"> Salih Yayla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, performance of proton exchange membrane PEM fuel cell was experimentally investigated. Coating on the anode side of the PEM fuel cell was accomplished with the spin method by using YSZ+SDC. A solution having 0,1 gr YttriaStabilized Zirconia (YSZ) + 0,1 Samarium-Doped Ceria (SDC) + 10 mL methanol was prepared. This solution was taken out and filled into a micro-pipette. Then the anode side of PEM fuel cell was coated with YSZ+ SDC by using spin method. In the experimental study, current, voltage and power performances before and after coating were recorded and then compared to each other. It was found that the efficiency of PEM fuel cell increases after the coating with YSZ+SDC. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fuel%20cell" title="fuel cell">fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=Polymer%20Electrolyte%20Membrane%20%28PEM%29" title=" Polymer Electrolyte Membrane (PEM)"> Polymer Electrolyte Membrane (PEM)</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane" title=" membrane"> membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20method" title=" spin method"> spin method</a> </p> <a href="https://publications.waset.org/abstracts/8063/experimental-investigation-of-performance-anode-side-of-pem-fuel-cell-with-spin-method-coated-with-yszsdc" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8063.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">562</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">300</span> Correlations in the Ising Kagome Lattice</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Antonio%20Aguilar%20Aguilar">Antonio Aguilar Aguilar</a>, <a href="https://publications.waset.org/abstracts/search?q=Eliezer%20Braun%20Guitler"> Eliezer Braun Guitler</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Using a previously developed procedure and with the aid of algebraic software, a two-dimensional generalized Ising model with a 4×2 unitary cell (UC), we obtain a Kagome Lattice with twelve different spin-spin values of interaction, in order to determine the partition function per spin L(T). From the partition function we can study the magnetic behavior of the system. Because of the competition phenomenon between spins, a very complex behavior among them in a variety of magnetic states can be observed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=correlations" title="correlations">correlations</a>, <a href="https://publications.waset.org/abstracts/search?q=Ising" title=" Ising"> Ising</a>, <a href="https://publications.waset.org/abstracts/search?q=Kagome" title=" Kagome"> Kagome</a>, <a href="https://publications.waset.org/abstracts/search?q=exact%20functions" title=" exact functions"> exact functions</a> </p> <a href="https://publications.waset.org/abstracts/17208/correlations-in-the-ising-kagome-lattice" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17208.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">368</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">299</span> Quasiperiodic Magnetic Chains as Spin Filters </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arunava%20Chakrabarti">Arunava Chakrabarti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A one-dimensional chain of magnetic atoms, representative of a quantum gas in an artificial quasi-periodic potential and modeled by the well-known Aubry-Andre function and its variants are studied in respect of its capability of working as a spin filter for arbitrary spins. The basic formulation is explained in terms of a perfectly periodic chain first, where it is shown that a definite correlation between the spin S of the incoming particles and the magnetic moment h of the substrate atoms can open up a gap in the energy spectrum. This is crucial for a spin filtering action. The simple one-dimensional chain is shown to be equivalent to a 2S+1 strand ladder network. This equivalence is exploited to work out the condition for the opening of gaps. The formulation is then applied for a one-dimensional chain with quasi-periodic variation in the site potentials, the magnetic moments and their orientations following an Aubry-Andre modulation and its variants. In addition, we show that a certain correlation between the system parameters can generate absolutely continuous bands in such systems populated by Bloch like extended wave functions only, signaling the possibility of a metal-insulator transition. This is a case of correlated disorder (a deterministic one), and the results provide a non-trivial variation to the famous Anderson localization problem. We have worked within a tight binding formalism and have presented explicit results for the spin half, spin one, three halves and spin five half particles incident on the magnetic chain to explain our scheme and the central results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aubry-Andre%20model" title="Aubry-Andre model">Aubry-Andre model</a>, <a href="https://publications.waset.org/abstracts/search?q=correlated%20disorder" title=" correlated disorder"> correlated disorder</a>, <a href="https://publications.waset.org/abstracts/search?q=localization" title=" localization"> localization</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20filter" title=" spin filter"> spin filter</a> </p> <a href="https://publications.waset.org/abstracts/55612/quasiperiodic-magnetic-chains-as-spin-filters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55612.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">356</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">298</span> Behavior of Current in a Semiconductor Nanostructure under Influence of Embedded Quantum Dots</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Paredes%20Guti%C3%A9rrez">H. Paredes Gutiérrez</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20T.%20P%C3%A9rez-Merchancano"> S. T. Pérez-Merchancano</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Motivated by recent experimental and theoretical developments, we investigate the influence of embedded quantum dot (EQD) of different geometries (lens, ring and pyramidal) in a double barrier heterostructure (DBH). We work with a general theory of quantum transport that accounts the tight-binding model for the spin dependent resonant tunneling in a semiconductor nanostructure, and Rashba spin orbital to study the spin orbit coupling. In this context, we use the second quantization theory for Rashba effect and the standard Green functions method. We calculate the current density as a function of the voltage without and in the presence of quantum dots. In the second case, we considered the size and shape of the quantum dot, and in the two cases, we worked considering the spin polarization affected by external electric fields. We found that the EQD generates significant changes in current when we consider different morphologies of EQD, as those described above. The first thing shown is that the current decreases significantly, such as the geometry of EQD is changed, prevailing the geometrical confinement. Likewise, we see that the current density decreases when the voltage is increased, showing that the quantum system studied here is more efficient when the morphology of the quantum dot changes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=quantum%20semiconductors" title="quantum semiconductors">quantum semiconductors</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructures" title=" nanostructures"> nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20dots" title=" quantum dots"> quantum dots</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20polarization" title=" spin polarization"> spin polarization</a> </p> <a href="https://publications.waset.org/abstracts/49796/behavior-of-current-in-a-semiconductor-nanostructure-under-influence-of-embedded-quantum-dots" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49796.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">271</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">297</span> Torque Magnetometry of Low Anisotropic CaCo2As2 Single Crystals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kashif%20Nadeem">Kashif Nadeem</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20Zhang"> W. Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=X.%20G.%20Qiu"> X. G. Qiu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Role of Co spins in CaCo2As2 single crystal is systematically studied by using dc magnetization and magnetic torque measurements. A spin-flop transition in the antiferromagnetism (AFM) CaCo2As2 single crystal is studied by using dc magnetization and magnetic torque. Field dependent and angle dependent torque magnetometry confirmed the existence of spin-flop transition in this compound which is in agreement with the dc magnetization studies. A comparison of dc magnetization and torque magnetometry measurements for CaCo2As2 single crystal is done in detail. In conclusion, torque magnetometry can be a useful tool to study the spin flop transition in low anisotropic compounds analogous to dc magnetization studies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spin%20flop%20transition" title="spin flop transition">spin flop transition</a>, <a href="https://publications.waset.org/abstracts/search?q=torque%20magnetometry" title=" torque magnetometry"> torque magnetometry</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetization" title=" magnetization"> magnetization</a>, <a href="https://publications.waset.org/abstracts/search?q=anisotropic" title=" anisotropic"> anisotropic</a> </p> <a href="https://publications.waset.org/abstracts/24659/torque-magnetometry-of-low-anisotropic-caco2as2-single-crystals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24659.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">548</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">296</span> Experimental Options for the Role of Dynamic Torsion in General Relativity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ivan%20Ravlich">Ivan Ravlich</a>, <a href="https://publications.waset.org/abstracts/search?q=Ivan%20Linscott"> Ivan Linscott</a>, <a href="https://publications.waset.org/abstracts/search?q=Sigrid%20Close"> Sigrid Close</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The experimental search for spin coupling in General Relativity via torsion has been inconclusive. In this work, further experimental avenues to test dynamic torsion are proposed and evaluated. In the extended theory, by relaxing the torsion free condition on the metric connection, general relativity is reformulated to relate the spin density of particles to a new quantity, the torsion tensor. In torsion theories, the spin tensor and torsion tensor are related in much the same way as the stress-energy tensor is related to the metric connection. Similarly, as the metric is the field associated with the metric connection, fields can be associated with the torsion tensor resulting in a field that is either propagating or static. Experimental searches for static torsion have thus far been inconclusive, and currently, there have been no experimental tests for propagating torsion. Experimental tests of propagating theories of torsion are proposed utilizing various spin densities of matter, such as interfaces in superconducting materials and plasmas. The experimental feasibility and observable bounds are estimated, and the most viable candidates are selected to pursue in detail in a future work. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=general%20relativity" title="general relativity">general relativity</a>, <a href="https://publications.waset.org/abstracts/search?q=gravitation" title=" gravitation"> gravitation</a>, <a href="https://publications.waset.org/abstracts/search?q=propagating%20torsion" title=" propagating torsion"> propagating torsion</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20density" title=" spin density"> spin density</a> </p> <a href="https://publications.waset.org/abstracts/77296/experimental-options-for-the-role-of-dynamic-torsion-in-general-relativity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77296.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">229</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">295</span> Inverted Umbrella-type Chiral Non-coplanar Ferrimagnetic Structure in Co(NO₃)₂ </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=O.%20Maximova">O. Maximova</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20L.%20Danilovich"> I. L. Danilovich</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20B.%20Deeva"> E. B. Deeva</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Y.%20Bukhteev"> K. Y. Bukhteev</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Vorobyova"> A. A. Vorobyova</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20V.%20Morozov"> I. V. Morozov</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20S.%20Volkova"> O. S. Volkova</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20A.%20Zvereva"> E. A. Zvereva</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20V.%20Solovyev"> I. V. Solovyev</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Nikolaev"> S. A. Nikolaev</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Phuyal"> D. Phuyal</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Abdel-Hafiez"> M. Abdel-Hafiez</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20C.%20Wang"> Y. C. Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Y.%20Lin"> J. Y. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20M.%20Chen"> J. M. Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20I.%20Gorbunov"> D. I. Gorbunov</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Puzniak"> K. Puzniak</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Lake"> B. Lake</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20N.%20Vasiliev"> A. N. Vasiliev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The low-dimensional magnetic systems tend to reveal exotic spin liquid ground states or form peculiar types of long-range order. Among systems of vivid interest are those characterized by the triangular motif in two dimensions. The realization of either ordered or disordered ground state in a triangular, honeycomb, or kagome lattices is are dictated by the competition of exchange interactions, also being sensitive to anisotropy and the spin value of magnetic ions. While the low-spin Heisenberg systems may arrive at a spin liquid long-range entangled quantum state with emergent gauge structures, the high-spin Ising systems may establish the rigid non-collinear structures. This study presents the case of chiral non-coplanar inverted umbrella-type ferrimagnet formed in cobalt nitrate Co(NO₃)₂ below T <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chiral%20magnetic%20structures" title="chiral magnetic structures">chiral magnetic structures</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20dimensional%20magnetic%20systems" title=" low dimensional magnetic systems"> low dimensional magnetic systems</a>, <a href="https://publications.waset.org/abstracts/search?q=umbrella-type%20ferrimagnets" title=" umbrella-type ferrimagnets"> umbrella-type ferrimagnets</a>, <a href="https://publications.waset.org/abstracts/search?q=chiral%20non-coplanar%20magnetic%20structures" title=" chiral non-coplanar magnetic structures"> chiral non-coplanar magnetic structures</a> </p> <a href="https://publications.waset.org/abstracts/130784/inverted-umbrella-type-chiral-non-coplanar-ferrimagnetic-structure-in-cono32" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130784.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">125</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">294</span> Spin-Flip and Magnetoelectric Coupling in Acentric and Non-Polar Pb₂MnO₄</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20D.%20Chandrasekhar">K. D. Chandrasekhar</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20C.%20Wu"> H. C. Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20J.%20Hsieh"> D. J. Hsieh</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20J.%20Song"> B. J. Song</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20-Y.%20Lin"> J. -Y. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20L.%20Her"> J. L. Her</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Z.%20Deng"> L. Z. Deng</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Gooch"> M. Gooch</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20W.%20Chu"> C. W. Chu</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20D.%20Yang"> H. D. Yang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stress-mediated coupling of electrical and magnetic dipoles in a single phase multiferroic is rare. Pb₂MnO₄ belong to multi-piezo crystal class with the space group P⁻42₁ <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=multiferroic" title="multiferroic">multiferroic</a>, <a href="https://publications.waset.org/abstracts/search?q=multipiezo" title=" multipiezo"> multipiezo</a>, <a href="https://publications.waset.org/abstracts/search?q=Pb%E2%82%82MnO%E2%82%84" title=" Pb₂MnO₄"> Pb₂MnO₄</a>, <a href="https://publications.waset.org/abstracts/search?q=spin-flip" title=" spin-flip"> spin-flip</a> </p> <a href="https://publications.waset.org/abstracts/99868/spin-flip-and-magnetoelectric-coupling-in-acentric-and-non-polar-pb2mno4" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/99868.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">236</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">293</span> Superconductor-Insulator Transition in Disordered Spin-1/2 Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20Cuevas">E. Cuevas</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Feigel%27man"> M. Feigel'man</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Ioffe"> L. Ioffe</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mezard"> M. Mezard</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The origin of continuous energy spectrum in large disordered interacting quantum systems is one of the key unsolved problems in quantum physics. While small quantum systems with discrete energy levels are noiseless and stay coherent forever in the absence of any coupling to external world, most large-scale quantum systems are able to produce thermal bath, thermal transport and excitation decay. This intrinsic decoherence is manifested by a broadening of energy levels which acquire a finite width. The important question is: What is the driving force and mechanism of transition(s) between two different types of many-body systems - with and without decoherence and thermal transport? Here, we address this question via two complementary approaches applied to the same model of quantum spin-1/2 system with XY-type exchange interaction and random transverse field. Namely, we develop analytical theory for this spin model on a Bethe lattice and implement numerical study of exact level statistics for the same spin model on random graph. This spin model is relevant to the study of pseudogaped superconductivity and S-I transition in some amorphous materials. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=strongly%20correlated%20electrons" title="strongly correlated electrons">strongly correlated electrons</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20phase%20transitions" title=" quantum phase transitions"> quantum phase transitions</a>, <a href="https://publications.waset.org/abstracts/search?q=superconductor" title=" superconductor"> superconductor</a>, <a href="https://publications.waset.org/abstracts/search?q=insulator" title=" insulator"> insulator</a> </p> <a href="https://publications.waset.org/abstracts/11183/superconductor-insulator-transition-in-disordered-spin-12-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11183.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">582</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">292</span> Magnetic versus Non-Magnetic Adatoms in Graphene Nanoribbons: Tuning of Spintronic Applications and the Quantum Spin Hall Phase</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saurabh%20Basu">Saurabh Basu</a>, <a href="https://publications.waset.org/abstracts/search?q=Sudin%20Ganguly"> Sudin Ganguly</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Conductance in graphene nanoribbons (GNR) in presence of magnetic (for example, Iron) and non-magnetic (for example, Gold) adatoms are explored theoretically within a Kane-Mele model for their possible spintronic applications and topologically non-trivial properties. In our work, we have considered the magnetic adatoms to induce a Rashba spin-orbit coupling (RSOC) and an exchange bias field, while the non-magnetic ones induce an RSOC and an intrinsic spin-orbit (SO) coupling. Even though RSOC is present in both, they, however, represent very different physical situations, where the magnetic adatoms do not preserve the time reversal symmetry, while the non-magnetic case does. This has important implications on the topological properties. For example, the non-magnetic adatoms, for moderately strong values of SO, the GNR denotes a quantum spin Hall insulator as evident from a 2e²/h plateau in the longitudinal conductance and presence of distinct conducting edge states with an insulating bulk. Since the edge states are protected by time reversal symmetry, the magnetic adatoms in GNR yield trivial insulators and do not possess any non-trivial topological property. However, they have greater utility than the non-magnetic adatoms from the point of view of spintronic applications. Owing to the broken spatial symmetry induced by the presence of adatoms of either type, all the x, y and z components of the spin-polarized conductance become non-zero (only the y-component survives in pristine Graphene owing to a mirror symmetry present there) and hence become suitable for spintronic applications. However, the values of the spin polarized conductances are at least two orders of magnitude larger in the case of magnetic adatoms than their non-magnetic counterpart, thereby ensuring more efficient spintronic applications. Further the applications are tunable by altering the adatom densities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetic%20and%20non-magnetic%20adatoms" title="magnetic and non-magnetic adatoms">magnetic and non-magnetic adatoms</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20spin%20hall%20phase" title=" quantum spin hall phase"> quantum spin hall phase</a>, <a href="https://publications.waset.org/abstracts/search?q=spintronic%20applications" title=" spintronic applications"> spintronic applications</a>, <a href="https://publications.waset.org/abstracts/search?q=spin%20polarized%20conductance" title=" spin polarized conductance"> spin polarized conductance</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20reversal%20symmetry" title=" time reversal symmetry"> time reversal symmetry</a> </p> <a href="https://publications.waset.org/abstracts/76194/magnetic-versus-non-magnetic-adatoms-in-graphene-nanoribbons-tuning-of-spintronic-applications-and-the-quantum-spin-hall-phase" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76194.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">302</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">291</span> Spin Coherent States Without Squeezing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Dehghani">A. Dehghani</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Shirin"> S. Shirin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We propose in this article a new configuration of quantum states, |α, β> := |α>×|β>. Which are composed of vector products of two different copies of spin coherent states, |α> and |β>. Some mathematical as well as physical properties of such states are discussed. For instance, it has been shown that the cross products of two coherent vectors remain coherent again. They admit a resolution of the identity through positive definite measures on the complex plane. They represent packets similar to the true coherent states, in other words we would not expect to take spin squeezing in any of the field quadratures Lˆx, Lˆy and Lˆz. Depending on the particular choice of parameters in the above scenarios, they can be converted into the so-called Dicke states which minimize the uncertainty relations of each pair of the angular momentum components. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vector%20%28Cross-%29products" title="vector (Cross-)products">vector (Cross-)products</a>, <a href="https://publications.waset.org/abstracts/search?q=minimum%20uncertainty" title=" minimum uncertainty"> minimum uncertainty</a>, <a href="https://publications.waset.org/abstracts/search?q=angular%20momentum" title=" angular momentum"> angular momentum</a>, <a href="https://publications.waset.org/abstracts/search?q=measurement" title=" measurement"> measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=Dicke%20states" title=" Dicke states"> Dicke states</a> </p> <a href="https://publications.waset.org/abstracts/30477/spin-coherent-states-without-squeezing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30477.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">412</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">290</span> Investigation on Electronic and Magnetic Properties of Transition Metals Doped Zinc Selenide</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Bentata">S. Bentata</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20Benstaali"> W. Benstaali</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Abbad"> A. Abbad</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20A.%20Bentounes"> H. A. Bentounes</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Bouadjemi"> B. Bouadjemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The full potential linear augmented plane wave (FPLAPW) based on density-functional theory (DFT) is employed to study the electronic, magnetic and optical properties of some transition metals doped ZnSe. Calculations are carried out by varying the doped atoms. Four 3D transition elements were used as a dopant: Cr, Mn, Co and Cu in order to induce spin polarization. Our results show that, Mn and Cu-doped ZnSe could be used in spintronic devices only if additional dopants are introduced, on the contrary, transition elements showing delocalized quality such as Cr, and Co doped ZnSe might be promising candidates for application in spintronic. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spin-up" title="spin-up">spin-up</a>, <a href="https://publications.waset.org/abstracts/search?q=spin-down" title=" spin-down"> spin-down</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20properties" title=" magnetic properties"> magnetic properties</a>, <a href="https://publications.waset.org/abstracts/search?q=transition%20metal" title=" transition metal"> transition metal</a>, <a href="https://publications.waset.org/abstracts/search?q=composite%20materials" title=" composite materials"> composite materials</a> </p> <a href="https://publications.waset.org/abstracts/1433/investigation-on-electronic-and-magnetic-properties-of-transition-metals-doped-zinc-selenide" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1433.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">273</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=5">5</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=6">6</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=7">7</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=8">8</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=9">9</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=spin%20reorientation&page=10">10</a></li> <li class="page-item"><a class="page-link" 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