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Magnetic excitations and anomalous spin-wave broadening in multiferroic FeV2O4

TitleMagnetic excitations and anomalous spin-wave broadening in multiferroic FeV2O4
Publication TypeJournal Article
Year of Publication2014
AuthorsZhang, Q, Ramazanoglu, M, Chi, SX, Liu, Y, Lograsso, TA, Vaknin, D
JournalPhysical Review B
Volume89
Pagination224416
Date Published06
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000338652100004
Keywordsoxides
Abstract

uced 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.

DOI10.1103/PhysRevB.89.224416
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Nanoscale and Ultrafast

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Novel Materials