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All-optical magnetization switching (AOS) in magneto-optical materials is promising phenomena for applications such as high-speed optical modulation technology, as it allows for magnetization reversal using only ultrashort laser pulses. We report on AOS induced by circularly polarized light in Bi,Ga-substituted magnetic garnet, Bi2.5R0.5Fe4GaO12 (R = Eu, Nd and Y), thin films prepared by the metal-organic decomposition method, which possess both large Faraday effect and perpendicular magnetic anisotropy. The experiments for circularly polarized light-induced magnetization reversal were performed using laser pulses with a wavelength of 514 nm and a pulse width of 230 fs. Helicity-dependent ring-shaped magnetic domains were formed around demagnetized domains for all samples, when approximately 200 pulses were cumulatively irradiated onto a single spot on the samples.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: All optical switching, Rare earch iron garnet

Date published: 2026-03-01

Publisher: Magnetics Society of Japan

Journal:

• Journal of the Magnetics Society of Japan (ISSN: 18822932) vol. 50 issue. 2 p. 30-33

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6206

First published URL: https://www.magnetics.jp/publication/j_2026_5002/

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Updated at: 2026-03-05 16:30:04 +0900

Published on MDR: 2026-03-05 13:42:55 +0900