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. |
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| 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 |
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