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[1507.02830] New synthesis route and magnetic structure of Tm2Mn2O7 - pyrochlore

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Differently from the reported in the past high pressure synthesis of the same compound applying oxides as starting materials, we have obtained a pure phase Tm2Mn2O7 by a converting TmMnO3 at 1100 C and 1300 bar oxygen pressure. The studies of Tm2Mn2O7 performed by a high resolution neutron powder diffraction have shown, that a pure pyrochlore cubic phase Tm2Mn2O7 (space group Fd-3m) have been obtained. On cooling below 25K there is a transition to a ferromagnetically (FM) ordered phase observed with an additional antiferromagnetic (AFM) canting suggesting a lowering of the initial cubic crystal symmetry. The magnetic transition is accompanied by small but well visible magnetostrsiction effect. 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Differently from the reported in the past high..."/> <meta name="twitter:image" content="https://static.arxiv.org/icons/twitter/arxiv-logo-twitter-square.png"/> <meta name="twitter:image:alt" content="arXiv logo"/> <link rel="stylesheet" media="screen" type="text/css" href="/static/browse/0.3.4/css/tooltip.css"/><link rel="stylesheet" media="screen" type="text/css" href="https://static.arxiv.org/js/bibex-dev/bibex.css?20200709"/> <script src="/static/browse/0.3.4/js/mathjaxToggle.min.js" type="text/javascript"></script> <script src="//code.jquery.com/jquery-latest.min.js" type="text/javascript"></script> <script src="//cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js" type="text/javascript"></script> <script src="//cdn.jsdelivr.net/npm/dompurify@2.3.5/dist/purify.min.js"></script> <script src="/static/browse/0.3.4/js/toggle-labs.js?20241022" type="text/javascript"></script> <script src="/static/browse/0.3.4/js/cite.js" type="text/javascript"></script><meta name="citation_title" content="New synthesis route and magnetic structure of Tm2Mn2O7 - pyrochlore" /><meta name="citation_author" content="Pomjakushina, Ekaterina" /><meta name="citation_author" content="Pomjakushin, Vladimir" /><meta name="citation_author" content="Rolfs, Katharina" /><meta name="citation_author" content="Karpinski, Janusz" /><meta name="citation_author" content="Conder, Kazimierz" /><meta name="citation_doi" content="10.1021/acs.inorgchem.5b01498" /><meta name="citation_date" content="2015/07/10" /><meta name="citation_online_date" content="2015/07/10" /><meta name="citation_pdf_url" content="http://arxiv.org/pdf/1507.02830" /><meta name="citation_arxiv_id" content="1507.02830" /><meta name="citation_abstract" content="In this work we present a new chemical route to synthesize Tm2Mn2O7 pyrochlore, a compound which is thermodynamically unstable at ambient pressure. Differently from the reported in the past high pressure synthesis of the same compound applying oxides as starting materials, we have obtained a pure phase Tm2Mn2O7 by a converting TmMnO3 at 1100 C and 1300 bar oxygen pressure. The studies of Tm2Mn2O7 performed by a high resolution neutron powder diffraction have shown, that a pure pyrochlore cubic phase Tm2Mn2O7 (space group Fd-3m) have been obtained. On cooling below 25K there is a transition to a ferromagnetically (FM) ordered phase observed with an additional antiferromagnetic (AFM) canting suggesting a lowering of the initial cubic crystal symmetry. The magnetic transition is accompanied by small but well visible magnetostrsiction effect. Using symmetry analysis we have found a solution for the AFM structure in the maximal Shubnikov subgroup I41/am&#39;d&#39;." /> </head> <body class="with-cu-identity"> <aside class="slider-wrapper bps-banner forum blue"> <a class="close-slider bps-banner" href="#"><img src="/static/browse/0.3.4/images/icons/close-slider.png" alt="close this message"></a> <div class="columns"> <img role="presentation" class="bps-banner-image" src="/static/browse/0.3.4/images/icons/smileybones-pixel.png" alt="arXiv Smilely Bones"> <div class="copy-donation bps-banner"> <h2>Happy Giving Tuesday - support arXiv today!</h2> <p>Thank you to everyone who makes arXiv possible. 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<div class="leftcolumn"> <div class="subheader"> <h1>Condensed Matter > Materials Science</h1> </div> <div class="header-breadcrumbs-mobile"> <strong>arXiv:1507.02830</strong> (cond-mat) </div> <link rel="stylesheet" type="text/css" href="/static/base/1.0.1/css/abs.css"> <div id="content-inner"> <div id="abs"> <div class="dateline"> [Submitted on 10 Jul 2015]</div> <h1 class="title mathjax"><span class="descriptor">Title:</span>New synthesis route and magnetic structure of Tm2Mn2O7 - pyrochlore</h1> <div class="authors"><span class="descriptor">Authors:</span><a href="https://arxiv.org/search/cond-mat?searchtype=author&amp;query=Pomjakushina,+E" rel="nofollow">Ekaterina Pomjakushina</a>, <a href="https://arxiv.org/search/cond-mat?searchtype=author&amp;query=Pomjakushin,+V" rel="nofollow">Vladimir Pomjakushin</a>, <a href="https://arxiv.org/search/cond-mat?searchtype=author&amp;query=Rolfs,+K" rel="nofollow">Katharina Rolfs</a>, <a href="https://arxiv.org/search/cond-mat?searchtype=author&amp;query=Karpinski,+J" rel="nofollow">Janusz Karpinski</a>, <a href="https://arxiv.org/search/cond-mat?searchtype=author&amp;query=Conder,+K" rel="nofollow">Kazimierz Conder</a></div> <div id="download-button-info" hidden>View a PDF of the paper titled New synthesis route and magnetic structure of Tm2Mn2O7 - pyrochlore, by Ekaterina Pomjakushina and 4 other authors</div> <a class="mobile-submission-download" href="/pdf/1507.02830">View PDF</a> <blockquote class="abstract mathjax"> <span class="descriptor">Abstract:</span>In this work we present a new chemical route to synthesize Tm2Mn2O7 pyrochlore, a compound which is thermodynamically unstable at ambient pressure. Differently from the reported in the past high pressure synthesis of the same compound applying oxides as starting materials, we have obtained a pure phase Tm2Mn2O7 by a converting TmMnO3 at 1100 C and 1300 bar oxygen pressure. The studies of Tm2Mn2O7 performed by a high resolution neutron powder diffraction have shown, that a pure pyrochlore cubic phase Tm2Mn2O7 (space group Fd-3m) have been obtained. On cooling below 25K there is a transition to a ferromagnetically (FM) ordered phase observed with an additional antiferromagnetic (AFM) canting suggesting a lowering of the initial cubic crystal symmetry. The magnetic transition is accompanied by small but well visible magnetostrsiction effect. Using symmetry analysis we have found a solution for the AFM structure in the maximal Shubnikov subgroup I41/am&#39;d&#39;. </blockquote> <!--CONTEXT--> <div class="metatable"> <table summary="Additional metadata"> <tr> <td class="tablecell label">Comments:</td> <td class="tablecell comments mathjax">20 pages, 9 figures</td> </tr> <tr> <td class="tablecell label">Subjects:</td> <td class="tablecell subjects"> <span class="primary-subject">Materials Science (cond-mat.mtrl-sci)</span>; Strongly Correlated Electrons (cond-mat.str-el)</td> </tr><tr> <td class="tablecell label">Cite as:</td> <td class="tablecell arxivid"><span class="arxivid"><a href="https://arxiv.org/abs/1507.02830">arXiv:1507.02830</a> [cond-mat.mtrl-sci]</span></td> </tr> <tr> <td class="tablecell label">&nbsp;</td> <td class="tablecell arxividv">(or <span class="arxivid"> <a href="https://arxiv.org/abs/1507.02830v1">arXiv:1507.02830v1</a> [cond-mat.mtrl-sci]</span> for this version) </td> </tr> <tr> <td class="tablecell label">&nbsp;</td> <td class="tablecell arxivdoi"> <a href="https://doi.org/10.48550/arXiv.1507.02830" id="arxiv-doi-link">https://doi.org/10.48550/arXiv.1507.02830</a><div class="button-and-tooltip"> <button class="more-info" aria-describedby="more-info-desc-1"> <svg height="15" role="presentation" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="currentColor" d="M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 110c23.196 0 42 18.804 42 42s-18.804 42-42 42-42-18.804-42-42 18.804-42 42-42zm56 254c0 6.627-5.373 12-12 12h-88c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h12v-64h-12c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h64c6.627 0 12 5.373 12 12v100h12c6.627 0 12 5.373 12 12v24z" class=""></path></svg> <span class="visually-hidden">Focus to learn more</span> </button> <!-- tooltip description --> <div role="tooltip" id="more-info-desc-1"> <span class="left-corner"></span> arXiv-issued DOI via DataCite</div> </div> </td> </tr> <tr> <td class="tablecell label">Journal&nbsp;reference:</td> <td class="tablecell jref">Inorg.Chem. 2015, 54, 9092-9097</td> </tr> <tr> <td class="tablecell label"> <abbr title="Digital Object Identifier">Related DOI</abbr>: </td> <td class="tablecell doi"><a href="https://doi.org/10.1021/acs.inorgchem.5b01498" data-doi="10.1021/acs.inorgchem.5b01498" class="link-https link-external" rel="external noopener nofollow">https://doi.org/10.1021/acs.inorgchem.5b01498</a> <!-- accessible tooltip example --> <div class="button-and-tooltip"> <button class="more-info" aria-describedby="more-info-desc-1"> <svg height="15" role="presentation" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="currentColor" d="M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 110c23.196 0 42 18.804 42 42s-18.804 42-42 42-42-18.804-42-42 18.804-42 42-42zm56 254c0 6.627-5.373 12-12 12h-88c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h12v-64h-12c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h64c6.627 0 12 5.373 12 12v100h12c6.627 0 12 5.373 12 12v24z" class=""></path></svg> <span class="visually-hidden">Focus to learn more</span> </button> <!-- tooltip description --> <div role="tooltip" id="more-info-desc-1"> <span class="left-corner"></span> DOI(s) linking to related resources </div> </div> </td> </tr> </table> </div> </div> </div> <div class="submission-history"> <h2>Submission history</h2> From: Ekaterina Pomjakushina [<a href="/show-email/28f17a77/1507.02830" rel="nofollow">view email</a>] <br/> <strong>[v1]</strong> Fri, 10 Jul 2015 10:04:23 UTC (2,629 KB)<br/> </div> </div> <!--end leftcolumn--> <div class="extra-services"> <div class="full-text"> <a name="other"></a> <span class="descriptor">Full-text links:</span> <h2>Access Paper:</h2> <ul> <div id="download-button-info" hidden> View a PDF of the paper titled New synthesis route and magnetic 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