title: Microwave Magnetochiral Dichroism in the Chiral-Lattice Magnet Cu_{2}OSeO_{3}.
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.
authors.affiliation: Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Okamura
authors.affiliation: RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
authors.forename: F
authors.initials: F
authors.lastname: Kagawa
authors.affiliation: RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.|PRESTO, Japan Science and Technology Agency, Bunkyo, Tokyo 113-8656, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Seki
authors.affiliation: RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.|Research and Development Headquarters, ROHM Co., Ltd., Kyoto 615-8585, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kubota
authors.affiliation: Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan.|RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kawasaki
authors.affiliation: Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan.|RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Tokura
mesh_terms: D002942:Circular Dichroism; D003300:Copper / Q000737:chemistry*; D059346:Magnets / Q000737:chemistry*; D008872:Microwaves; D008962:Models, Theoretical; D020887:Selenious Acid / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D003300:Copper; D020887:Selenious Acid; C000520:cuprous oxide