Magnetic excitations and anomalous spin-wave broadening in multiferroic FeV2O4 Zhang, Qiang Lograsso, Thomas Ramazanoglu, Mehmet Chi, Songxue Liu, Yong Lograsso, Thomas Vaknin, David
dc.contributor.department Ames Laboratory 2018-02-16T10:59:39.000 2020-06-29T23:26:18Z 2020-06-29T23:26:18Z Wed Jan 01 00:00:00 UTC 2014 2014-06-01
dc.description.abstract <p>We report on the different roles of two orbital-active Fe2+ at the A site and V3+ at the B site in the magnetic excitations and on the anomalous spin-wave broadening in FeV2O4. FeV2O4 exhibits three structural transitions and successive paramagnetic (PM)–collinear ferrimagnetic (CFI)–noncollinear ferrimagnetic (NCFI)/ferroelectric transitions. The high-temperature tetragonal/PM–orthorhombic/CFI transition is accompanied by the appearance of a large energy gap in the magnetic excitations due to strong spin-orbit-coupling-induced anisotropy at the Fe2+ site. While there is no measurable increase in the energy gap from the orbital ordering of V3+ at the orthorhombic/CFI–tetragonal/NCFI transition, anomalous spin-wave broadening is observed in the orthorhombic/CFI state due to V3+ spin fluctuations at the B site. The spin-wave broadening is also observed at the zone boundary without softening in the NCFI/ferroelectric phase, which is discussed in terms of magnon-phonon coupling. Our study also indicates that the Fe2+ spins without the frustration at the A site may not play an important role in inducing ferroelectricity in the tetragonal/NCFI phase of FeV2O4.</p>
dc.description.comments <p>This article is from <em>Physical Review B</em> 89 (2014): 224416, doi:<a href="" target="_blank">10.1103/PhysRevB.89.224416</a>. Posted with permission.</p>
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dc.identifier archive/
dc.identifier.articleid 1261
dc.identifier.contextkey 7168431
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_pubs/259
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 22:59:45 UTC 2022
dc.source.uri 10.1103/PhysRevB.89.224416
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Engineering Physics
dc.subject.disciplines Metallurgy
dc.subject.keywords Physics and Astronomy
dc.subject.keywords Materials Science and Engineering
dc.title Magnetic excitations and anomalous spin-wave broadening in multiferroic FeV2O4
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 316ee29f-99a9-49bc-a048-0f43caf97aa5
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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