期刊
PHYSICAL REVIEW B
卷 97, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.085154
关键词
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资金
- National Natural Science Foundation of China (NSFC) [11774217, 51372149, 51672171]
- National Key Basic Research Program of China [2015CB921600]
- Eastern Scholar Program from Shanghai Municipal Education Commission
- Science and Technology Commission of Shanghai Municipality [16DZ2260600]
Neutron powder diffraction experiments reveal that Co4Nb2O9 forms a noncollinear in-plane magnetic structure with Co2+ moments lying in the ab plane. The spin-wave excitations of this magnet were measured by using inelastic neutron scattering and soundly simulated by a dynamic model involving nearest-and next-nearest-neighbor exchange interactions, in-plane anisotropy, and the Dzyaloshinskii-Moriya interaction. The in-plane magnetic structure of Co4Nb2O9 is attributed to the large in-plane anisotropy, while the noncollinearity of the spin configuration is attributed to the Dzyaloshinskii-Moriya interaction. The high magnetoelectric coupling effect of Co4Nb2O9 in fields can be explained by its special in-plane magnetic structure.
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