Inelastic Neutron Scattering on Multiferroics NdFe3(BO3)4

Shohei Hayashida, Minoru Soda, Shinichi Itoh, Tetsuya Yokoo, Kenya Ohgushi, Daichi Kawana, Takatsugu Masuda

研究成果: Conference article査読

6 被引用数 (Scopus)

抄録

Inelastic neutron scattering experiment is performed on single crystals of multiferroics NdFe3(11BO3)4 to explore the magnetic excitations. Fe-centered dispersive excitation with the band width of 5 meV is observed along the crystallographic c∗ direction and that of 3 meV is along the a∗ direction. The energy gap of 0.57 meV due to an axial-type anisotropy is observed at the AF zone center. The energy of Nd-centered flat excitation is 1 meV. Furthermore, anticrossing of the Fe- and Nd-centered excitations is observed, meaning the existence of the f -d coupling, i.e., the interaction between the Nd3+ and Fe3+ moments. Spin-wave analysis on the observed neutron spectrum revealed the underlying magnetic Hamiltonian in NdFe3(11BO3)4. Discussion on the axial-type anisotropy in the ab-plane based on the magnetic model leads to the conclusion that the anisotropy of the Nd3+ ion plays a main role in the determination of the structures of both magnetic moment and electric polarization in NdFe3(BO3)4.

本文言語English
ページ(範囲)127-133
ページ数7
ジャーナルPhysics Procedia
75
DOI
出版ステータスPublished - 2015
イベント20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain
継続期間: 2015 7月 52015 7月 10

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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