Comprehensive inelastic neutron scattering study of the multiferroic Mn1-x Cox WO4

Jinchen Wang, R. S. Fishman, Yiming Qiu, J. A. Fernandez-Baca, Georg Ehlers, K. C. Liang, Yaqi Wang, Bernd Lorenz, C. W. Chu, Feng Ye

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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 (Ji 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.

Original languageEnglish
Article number214425
JournalPhysical Review B
Volume98
Issue number21
DOIs
Publication statusPublished - 2018 Dec 14

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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