Magnetic excitations and anomalous spin-wave broadening in multiferroic FeV2O4

dc.contributor.author Zhang, Qiang
dc.contributor.author Lograsso, Thomas
dc.contributor.author Ramazanoglu, Mehmet
dc.contributor.author Chi, Songxue
dc.contributor.author Liu, Yong
dc.contributor.author Lograsso, Thomas
dc.contributor.author Vaknin, David
dc.contributor.department Ames Laboratory
dc.date 2018-02-16T10:59:39.000
dc.date.accessioned 2020-06-29T23:26:18Z
dc.date.available 2020-06-29T23:26:18Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2014
dc.date.issued 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="http://dx.doi.org/10.1103/PhysRevB.89.224416" target="_blank">10.1103/PhysRevB.89.224416</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ameslab_pubs/259/
dc.identifier.articleid 1261
dc.identifier.contextkey 7168431
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_pubs/259
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/7811
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_pubs/259/2014_Zhang_MagneticExcitations.pdf|||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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