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research article
Spin-Nematic Interaction in the Multiferroic Compound Ba2CoGe2O7
We demonstrate the existence of the spin-nematic interactions in an easy-plane type antiferromagnet Ba2CoGe2O7 by exploring the magnetic anisotropy and spin dynamics. The 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.
Type
research article
Web of Science ID
WOS:000333920000033
Authors
Soda, M.
•
Matsumoto, M.
•
•
Ohira-Kawamura, S.
•
Nakajima, K.
•
Shiina, R.
•
Masuda, T.
Publication date
2014
Publisher
Published in
Volume
112
Issue
12
Article Number
127205
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
May 19, 2014
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