{"title":"Target and Equalizer Design for Perpendicular Heat-Assisted Magnetic Recording","authors":"P. Tueku, P. Supnithi, R. Wongsathan","volume":87,"journal":"International Journal of Electronics and Communication Engineering","pagesStart":541,"pagesEnd":548,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9997833","abstract":"<p>Heat-Assisted Magnetic Recording (HAMR) is one of the leading technologies identified to enable areal density beyond 1 Tb\/in<sup>2<\/sup> of magnetic recording systems. A key challenge to HAMR designing is accuracy of positioning, timing of the firing laser, power of the laser, thermo-magnetic head, head-disk interface and cooling system. We study the effect of HAMR parameters on transition center and transition width. The HAMR is model using Thermal Williams-Comstock (TWC) and microtrack model. The target and equalizer are designed by the minimum mean square error (MMSE). The result shows that the unit energy constraint outperforms other constraints.<\/p>\r\n","references":"[1]\tO. Heinonen and K.Z Gao, \"Extension of perpendicular recording,\" Journal of Magnetism and Magnetic Material, 2008, pp.2885-2888.\r\n[2]\tY. Shiroishi, K. Fukuda et al., \"Future Options for HDD Storage,\" IEEE Trans. Magn., vol. 45, no. 10, pp. 3816-3822, Oct. 2009.\r\n[3]\tE.M. Kurtas, M.F. Erden et al., \"Future read channel technologies and challenges for high density data storage applications, Acoustics, Speech, and Signal Processing,\u201d Proceedings of ICASSP 2005, pp. 737-740. \r\n[4]\tT. Rausch, J.A. Bain, D.D. Stancil, and T.E. Schelsinger, \"Thermal Williams-Comstock model for predicting transition lengths in heat-assisted magnetic recording system,\" IEEE Trans. Magn., vol. 40, no. 1, pp. 137-147, Jan. 2004.\r\n[5]\tM.F. Erden, T. Rausch, W.A. Challener, \"Cross-track location and transition parameter effects in heat-assisted magnetic recording,\u201d IEEE Trans. Magn., vol. 41, no. 6, pp.2189-2194, Jun. 2005.\r\n[6]\tR. Radhakrishnan, M.F. Erden et al., \"Transition Response Characteristics of Heat-Assisted Magnetic Recording and Their Performance With MTR Codes,\" IEEE Trans. Magn., vol. 43, no. 6, pp. 2298-2300, Jun. 2007.\r\n[7]\tR. Radhakrishnan, B. Vasic, M.F. Erden et al., \"Characterization of of Heat-Assisted Magnetic Recording Channels,\u201d DIMACS Series in Discrete Mathematic sand Theoretical Computer Science, vol. 73, pp. 25-41, 2007.\r\n[8]\tM.H. Kryder, E.C. Gage et al., \"Heat-Assisted Magnetic Recording,\u201d Invited Paper Proceedings of the IEEE, vol. 96, no. 11: 1810-1835, Noember. 2008.\r\n[9]\tR. Wongsathan and P. Supnithi \"Channel response of HAMR with linear temperature-dependent coercivity and remanent magnetization,\u201d in Conf. Rec. 2012 IEEE Int Conf. ECTI-CON, 2012, pp. 1-4.\r\n[10]\tJ.U. Thiele, K.R. Coffey, M.F. Toney, J.A. Hedstrom, and A.J. Kellock, \"Temperature dependent magnetic properties of highly chemically ordered Fe55\u2212xNixPt45L10 films,\u201d J. Appl. Phys., vol. 91, no. 10, pp. 6595-6600, May 2002.\r\n[11]\tP. Kovintavewat, I. Ozgunes, E. Kurtas, J.R. Barry and S.W. McLaughlin, \"Generalized Partial-Reaponse Targets for Perpendicular Recording with Jitter Noise,\u201d IEEE Trans. Magn., vol.38, no.5, pp. 2340-2342, Sep. 2002.\r\n[12]\tH.N. Bertram, Theory of Magnetic Recording. Cambridge, U.K.: Cambridge Univ. Press 1994, ch. 5, pp. 107-138.\r\n[13]\tB. Vasic and E.M. Kurtas, Coding and Signal Processing for Magnetics Recording Systems, Boca Raton, CRC PRESS 2005, ch. 2, pp. 2.2-1-2.2-26.\r\n[14]\tP. Kovintavewat, Signal Processing for Digital Data Storage Volume II: Receiver Design, National Electronics and computer Techonology Center(NECTEC) 2007, ch. 3, pp. 43-64.\r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 87, 2014"}