We investigate the single-domain switching of magnetization with a femtosecond laser pulse in Co-doped iron garnet films using time-resolved magneto-optical imaging. This switching regime is achieved with a pump fluence that is two times lower than the fluence required for multi-domain switching. We observed the picoseconds magnetization dynamics of switching in a single bubble domain with a diameter of a few micrometers by tuning the pump laser fluence. This may provide opportunities for cold photo-magnetic recording in magnetic bits approaching the nano-size scale.
Time-resolved photo-magnetic switching of bubble domains in ferrimagnetic garnets
Note: This paper is part of the APL Special Collection on Ferrimagnetic Spintronics.
T. Zalewski, A. Maziewski, A. Stupakiewicz; Time-resolved photo-magnetic switching of bubble domains in ferrimagnetic garnets. Appl. Phys. Lett. 17 July 2023; 123 (3): 032402. https://doi.org/10.1063/5.0157894
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