Comprehensive inelastic neutron scattering study of the multiferroic Mn1-xCoxWO4

Article

关键词: POLARIZATION;   

DOI  :  10.1103/PhysRevB.98.214425

来源: SCIE

【 摘 要 】

Using high-resolution inelastic neutron scattering, we examine the spin dynamics of Mn1-xCoxWO4 in the collinear AF1, the ac-b spiral AF2, and the ac cycloidal AF5 phases. The spin wave excitations are well described by a Heisenberg model with competing long-range exchange interactions (J(i) up to 12th nearest neighbors) and the single-ion anisotropy K induced by the spin-orbit interaction. While the exchange constants are relatively unchanged, the dominant effect of doping is to change the single-ion anisotropy from easy axis (K > 0) in the collinear AF1 phase to easy plane (K < 0) in the two multiferroic phases.

【 授权许可】

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