Magnetoelectric resonances and predicted microwave diode effect of the skyrmion crystal in a multiferroic chiral-lattice magnet

Masahito Mochizuki, Shinichiro Seki

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We theoretically discover that unique eigenmodes of skyrmion crystal (SkX) are not only magnetically active to an ac magnetic field (Hω) but also electrically active to an ac electric field (Eω) in a multiferroic chiral-lattice magnet Cu2OSeO3, which amplifies the dynamical magnetoelectric coupling between Eω and the spin texture. The resulting intense interference between their electric and their magnetic activation processes can lead to an unprecedentedly large diode effect on the microwave, i.e., its absorption by SkX changes up to ∼20% when the incident direction is reversed. Our results demonstrate that the skyrmion could be a promising building block for microwave devices.

Original languageEnglish
Article number134403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number13
DOIs
Publication statusPublished - 2013 Apr 3
Externally publishedYes

Fingerprint

Microwave devices
Crystal lattices
Magnets
Diodes
magnets
Textures
Chemical activation
diodes
Microwaves
Electric fields
Magnetic fields
microwaves
Crystals
crystals
textures
activation
interference
electric fields
magnetic fields
Direction compound

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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abstract = "We theoretically discover that unique eigenmodes of skyrmion crystal (SkX) are not only magnetically active to an ac magnetic field (Hω) but also electrically active to an ac electric field (Eω) in a multiferroic chiral-lattice magnet Cu2OSeO3, which amplifies the dynamical magnetoelectric coupling between Eω and the spin texture. The resulting intense interference between their electric and their magnetic activation processes can lead to an unprecedentedly large diode effect on the microwave, i.e., its absorption by SkX changes up to ∼20{\%} when the incident direction is reversed. Our results demonstrate that the skyrmion could be a promising building block for microwave devices.",
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AB - We theoretically discover that unique eigenmodes of skyrmion crystal (SkX) are not only magnetically active to an ac magnetic field (Hω) but also electrically active to an ac electric field (Eω) in a multiferroic chiral-lattice magnet Cu2OSeO3, which amplifies the dynamical magnetoelectric coupling between Eω and the spin texture. The resulting intense interference between their electric and their magnetic activation processes can lead to an unprecedentedly large diode effect on the microwave, i.e., its absorption by SkX changes up to ∼20% when the incident direction is reversed. Our results demonstrate that the skyrmion could be a promising building block for microwave devices.

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