Spin wave measurements over the full Brillouin zone of multiferroic BiFeO 3

Jaehong Jeong, E. A. Goremychkin, T. Guidi, K. Nakajima, Gun Sang Jeon, Shin Ae Kim, S. Furukawa, Yong Baek Kim, Seongsu Lee, V. Kiryukhin, S. W. Cheong, Je Geun Park

研究成果: Article査読

70 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号077202
ジャーナルPhysical review letters
108
7
DOI
出版ステータスPublished - 2012 2 14
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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