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자연과학대학
물리학전공
Journal papers
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Spin wave measurements over the full Brillouin zone of multiferroic BiFeO 3
Title
Spin wave measurements over the full Brillouin zone of multiferroic BiFeO 3
Authors
Jeong J.
;
Goremychkin E.A.
;
Guidi T.
;
Nakajima K.
;
Jeon G.S.
;
Kim S.-A.
;
Furukawa S.
;
Kim Y.B.
;
Lee S.
;
Kiryukhin V.
;
Cheong S.-W.
;
Park J.-G.
Ewha Authors
전건상
SCOPUS Author ID
전건상
Issue Date
2012
Journal Title
Physical Review Letters
ISSN
0031-9007
Citation
Physical Review Letters vol. 108, no. 7
Indexed
SCI; SCIE; SCOPUS
Document Type
Article
Abstract
Using the inelastic neutron scattering technique, we measured the spin wave dispersion over the entire Brillouin zone of room temperature multiferroic BiFeO 3 single crystals with magnetic excitations extending to as high as 72.5meV. The full spin waves can be explained by a simple Heisenberg Hamiltonian with a nearest-neighbor exchange interaction (J=4.38meV), a next-nearest-neighbor exchange interaction (J'=0.15meV), and a Dzyaloshinskii-Moriya-like term (D=0.107meV). This simple Hamiltonian determined, for the first time, for BiFeO 3 provides a fundamental ingredient for understanding the novel magnetic properties of BiFeO 3. © 2012 American Physical Society.
DOI
10.1103/PhysRevLett.108.077202
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