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arXiv 2003.070222020-03-16cond-mat.mes-hall

Creation of nanometric magnetic skyrmions by global application of circularly polarized microwave magnetic field

Masayuki Miyake, Masahito Mochizuki

备注：: 10 pages, 6 figures, accepted for publication in Physical Review B
发表信息：: Phys. Rev. B101, 094419 (2020)
DOI：: 10.1103/PhysRevB.101.094419

英文摘要：

From a theoretical perspective, we demonstrate that nanometric magnetic skyrmions are created by application of a circularly polarized microwave magnetic field to a thin-plate Dzyaloshinskii-Moriya ferromagnet with fabricated rectangular holes. This phenomenon is caused by an effective steady magnetic field perpendicular to the microwave-polarization plane induced by the rotating magnetic field and the intense interference of spin waves excited by this magnetic field due to the hole structure, which causes reversals of local magnetizations and results in the formation of skyrmions. Our proposal provides a new option to write or create magnetic textures the sizes of which are much smaller than the spot size of the external stimulus such as magnetic field, light, and microwave.

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