Circularly Polarized Light-Induced Magnetization Reversal in Bi,Ga-Substituted Magnetic Garnet Films
Abstract
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.
Fields of Study & Subjects
Magneto-Optical Properties and Applications
Multiferroics and related materials
Magnetic properties of thin films
Publication details
- Journal / source
- Journal of the Magnetics Society of Japan
- Publisher
- The Magnetics Society of Japan
- Volume
- 50
- Issue
- 2
- Pages
- 30–33
- Publication date
- 28 February 2026
- Language
- EN