Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic

Y. Okamura, F. Kagawa, Masahito Mochizuki, M. Kubota, S. Seki, S. Ishiwata, M. Kawasaki, Y. Onose, Y. Tokura

研究成果: Article

89 引用 (Scopus)

抄録

Magnetic skyrmion, a topologically stable spin-swirling object, can host emergent electromagnetism, as exemplified by the topological Hall effect and electric-current-driven skyrmion motion. To achieve efficient manipulation of nano-sized functional spin textures, it is imperative to exploit the resonant motion of skyrmions, analogously to the role of the ferromagnetic resonance in spintronics. The magnetic resonance of skyrmions has recently been detected with oscillating magnetic fields at 1-2 GHz, launching a search for new skyrmion functionality operating at microwave frequencies. Here we show a microwave magnetoelectric effect in resonant skyrmion dynamics. Through microwave transmittance spectroscopy on the skyrmion-hosting multiferroic crystal Cu 2 OSeO 3 combined with theoretical simulations, we reveal nonreciprocal directional dichroism (NDD) at the resonant mode, that is, oppositely propagating microwaves exhibit different absorption. The microscopic mechanism of the present NDD is not associated with the conventional Faraday effect but with the skyrmion magnetoelectric resonance instead, suggesting a conceptually new microwave functionality.

元の言語English
記事番号2391
ジャーナルNature Communications
4
DOI
出版物ステータスPublished - 2013
外部発表Yes

Fingerprint

Magnetoelectric effects
Microwaves
microwaves
dichroism
Electromagnetism
Ferromagnetic resonance
Faraday effect
Magnetoelectronics
swirling
launching
Microwave frequencies
Launching
Hall effect
Electric currents
Magnetic resonance
ferromagnetic resonance
microwave frequencies
electric current
magnetic resonance
manipulators

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

これを引用

Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic. / Okamura, Y.; Kagawa, F.; Mochizuki, Masahito; Kubota, M.; Seki, S.; Ishiwata, S.; Kawasaki, M.; Onose, Y.; Tokura, Y.

:: Nature Communications, 巻 4, 2391, 2013.

研究成果: Article

Okamura, Y, Kagawa, F, Mochizuki, M, Kubota, M, Seki, S, Ishiwata, S, Kawasaki, M, Onose, Y & Tokura, Y 2013, 'Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic', Nature Communications, 巻. 4, 2391. https://doi.org/10.1038/ncomms3391
Okamura, Y. ; Kagawa, F. ; Mochizuki, Masahito ; Kubota, M. ; Seki, S. ; Ishiwata, S. ; Kawasaki, M. ; Onose, Y. ; Tokura, Y. / Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic. :: Nature Communications. 2013 ; 巻 4.
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AU - Seki, S.

AU - Ishiwata, S.

AU - Kawasaki, M.

AU - Onose, Y.

AU - Tokura, Y.

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AB - Magnetic skyrmion, a topologically stable spin-swirling object, can host emergent electromagnetism, as exemplified by the topological Hall effect and electric-current-driven skyrmion motion. To achieve efficient manipulation of nano-sized functional spin textures, it is imperative to exploit the resonant motion of skyrmions, analogously to the role of the ferromagnetic resonance in spintronics. The magnetic resonance of skyrmions has recently been detected with oscillating magnetic fields at 1-2 GHz, launching a search for new skyrmion functionality operating at microwave frequencies. Here we show a microwave magnetoelectric effect in resonant skyrmion dynamics. Through microwave transmittance spectroscopy on the skyrmion-hosting multiferroic crystal Cu 2 OSeO 3 combined with theoretical simulations, we reveal nonreciprocal directional dichroism (NDD) at the resonant mode, that is, oppositely propagating microwaves exhibit different absorption. The microscopic mechanism of the present NDD is not associated with the conventional Faraday effect but with the skyrmion magnetoelectric resonance instead, suggesting a conceptually new microwave functionality.

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