Theory of magnetoelastic resonance in a monoaxial chiral helimagnet

We study magnetoelastic resonance phenomena in a monoaxial chiral helimagnet belonging to the hexagonal crystal class. By computing the spectrum of a coupled elastic wave and spin wave, it is demonstrated how hybridization occurs depending on their chirality. Specific features of the magnetoelastic...

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Bibliographic Details
Published in:Physical review. B 2018-05, Vol.97 (18), Article 184303
Main Authors: Tereshchenko, A. A., Ovchinnikov, A. S., Proskurin, Igor, Sinitsyn, E. V., Kishine, Jun-ichiro
Format: Article
Language:English
Subjects:
Chirality
Circular polarization
Elastic waves
Ferromagnetism
Linear polarization
Magnons
Polarized elastic waves
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Summary:We study magnetoelastic resonance phenomena in a monoaxial chiral helimagnet belonging to the hexagonal crystal class. By computing the spectrum of a coupled elastic wave and spin wave, it is demonstrated how hybridization occurs depending on their chirality. Specific features of the magnetoelastic resonance are discussed for the conical phase and the soliton lattice phase stabilized in the monoaxial chiral helimagnet. The former phase exhibits appreciable nonreciprocity of the spectrum, and the latter is characterized by a multiresonance behavior. We propose that the nonreciprocal spin wave around the forced-ferromagnetic state has potential capability to convert the linearly polarized elastic wave to a circularly polarized one with the chirality opposite to the spin-wave chirality.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.97.184303