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Phys Rev Lett. 2015 May 15;114(19):197202. Epub 2015 May 12.

Microwave Magnetochiral Dichroism in the Chiral-Lattice Magnet Cu_{2}OSeO_{3}.

Author information

1
Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan.
2
RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
3
PRESTO, Japan Science and Technology Agency, Bunkyo, Tokyo 113-8656, Japan.
4
Research and Development Headquarters, ROHM Co., Ltd., Kyoto 615-8585, Japan.

Abstract

Through broadband microwave spectroscopy in Faraday geometry, we observe distinct absorption spectra accompanying magnetoelectric (ME) resonance for oppositely propagating microwaves, i.e., directional dichroism, in the multiferroic chiral-lattice magnet Cu_{2}OSeO_{3}. The magnitude of the directional dichroism critically depends on the magnetic-field direction. Such behavior is well accounted for by considering the relative direction of the oscillating electric polarizations induced via the ME effect with respect to microwave electric fields. Directional dichroism in a system with an arbitrary form of ME coupling can be also discussed in the same manner.

PMID:
26024193
DOI:
10.1103/PhysRevLett.114.197202
[Indexed for MEDLINE]

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