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Spin Dynamics and Magnetoelectric Coupling Mechanism of Co4Nb2O9
- Source :
- Phys. Rev. B 97, 085154 (2018)
- Publication Year :
- 2017
-
Abstract
- 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.<br />Comment: 13pages, 3 figures
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 97, 085154 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1705.04017
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.97.085154