Temperature-dependent interplay of dzyaloshinskii-moriya interaction and single-ion anisotropy in multiferroic BiFeO 3

Jaehong Jeong, Manh Duc Le, P. Bourges, S. Petit, Shunsuke Furukawa, Shin Ae Kim, Seongsu Lee, S. W. Cheong, Je Geun Park

Research output: Contribution to journalArticle

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Abstract

Low-energy magnon excitations in multiferroic BiFeO 3 were measured in detail as a function of temperature around several Brillouin zone centers by inelastic neutron scattering experiments on single crystals. Unique features around 1 meV are directly associated with the interplay of the Dzyaloshinskii-Moriya interaction and a small single-ion anisotropy. The temperature dependence of these and the exchange interactions were determined by fitting the measured magnon dispersion with spin-wave calculations. The spectra best fit an easy-axis type magnetic anisotropy and the deduced exchange and anisotropy parameters enable us to determine the anharmonicity of the magnetic cycloid. We then draw a direct connection between the changes in the parameters of spin Hamiltonian with temperature and the physical properties and structural deformations of BiFeO 3 .

Original languageEnglish
Article number107202
JournalPhysical Review Letters
Volume113
Issue number10
DOIs
Publication statusPublished - 2014 Sep 4
Externally publishedYes

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anisotropy
cycloids
ions
interactions
Brillouin zones
magnons
temperature
inelastic scattering
neutron scattering
physical properties
temperature dependence
single crystals
excitation
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Temperature-dependent interplay of dzyaloshinskii-moriya interaction and single-ion anisotropy in multiferroic BiFeO 3 . / Jeong, Jaehong; Le, Manh Duc; Bourges, P.; Petit, S.; Furukawa, Shunsuke; Kim, Shin Ae; Lee, Seongsu; Cheong, S. W.; Park, Je Geun.

In: Physical Review Letters, Vol. 113, No. 10, 107202, 04.09.2014.

Research output: Contribution to journalArticle

Jeong, Jaehong ; Le, Manh Duc ; Bourges, P. ; Petit, S. ; Furukawa, Shunsuke ; Kim, Shin Ae ; Lee, Seongsu ; Cheong, S. W. ; Park, Je Geun. / Temperature-dependent interplay of dzyaloshinskii-moriya interaction and single-ion anisotropy in multiferroic BiFeO 3 In: Physical Review Letters. 2014 ; Vol. 113, No. 10.
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AU - Furukawa, Shunsuke

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