Spin Dynamics and Magnetoelectric Coupling Mechanism of Co4Nb2O9
Autor: | Deng, Guochu, Cao, Yiming, Ren, Wei, Cao, Shixun, Studer, Andrew J., Gauthier, Nicolas, Kenzelmann, Michel, Davidson, Gene, Rule, Kirrily C., Gardner, Jason S., Imperia, Paolo, Ulrich, Clemens, McIntyre, Garry J. |
---|---|
Rok vydání: | 2017 |
Předmět: | |
Zdroj: | Phys. Rev. B 97, 085154 (2018) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevB.97.085154 |
Popis: | 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 neighbour 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. Comment: 13pages, 3 figures |
Databáze: | arXiv |
Externí odkaz: |