Spin nematic interaction in multiferroic compound Ba$_{2}$CoGe$_{2}$O$_{7}$

M. Soda; M. Matsumoto; M. Mansson; S. Ohira-Kawamura; K. Nakajima; R. Shiina; T. Masuda

doi:10.1103/PhysRevLett.112.127205

Spin nematic interaction in multiferroic compound Ba$_{2}$CoGe$_{2}$O$_{7}$

Strongly Correlated Electrons 2015-06-18 v1

Authors: M. Soda , M. Matsumoto , M. Mansson , S. Ohira-Kawamura , K. Nakajima , R. Shiina , T. Masuda

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Abstract

We demonstrate the existence of the spin nematic interactions in an easy-plane type antiferromagnet Ba $_{2}$ CoGe $_{2}$ O $_{7}$ by exploring the magnetic anisotropy and spin dynamics. Combination of neutron scattering and magnetic susceptibility measurements reveals that the origin of the in-plane anisotropy is an antiferro-type interaction of the spin nematic operator. The relation between the nematic operator and the electric polarization in the ligand symmetry of this compound is presented. The introduction of the spin nematic interaction is useful to understand the physics of spin and electric dipole in multiferroic compounds.

Keywords

magnetism magnetic anisotropy

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@article{arxiv.1402.6436,
  title  = {Spin nematic interaction in multiferroic compound Ba$_{2}$CoGe$_{2}$O$_{7}$},
  author = {M. Soda and M. Matsumoto and M. Mansson and S. Ohira-Kawamura and K. Nakajima and R. Shiina and T. Masuda},
  journal= {arXiv preprint arXiv:1402.6436},
  year   = {2015}
}

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5 pages, 4 figures

Spin nematic interaction in multiferroic compound Ba$_{2}$CoGe$_{2}$O$_{7}$

Abstract

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