Title :
Process of Magnetization Reversal in a Spot Heated by Pulsed Laser Beam
Author :
Oda, H. ; Matsushima, M.
Author_Institution :
Research Center, Canon Inc., Atsugi.
Abstract :
A pulsed laser beam was fired at Tb(FeCo) films (2 ¿m spot diameter) and its effect on Kerr rotation angle (¿K) aging was studied, using an avalanche photo diode (APD) as a monitor. It was found that in RE-rich films, the magnetization changed whether or not a bias magnetic field was applied. No such signal was observed in TM-rich films in zero magnetic fields, possibly because of the formation of alternating maze domains within the laser spot which cancel out the Kerr rotation angle.
Keywords :
Laser beam cutting; Laser beams; Magnetic field measurement; Magnetic fields; Magnetic films; Magnetization reversal; Optical pulses; Power lasers; Pulse measurements; Semiconductor lasers;
Journal_Title :
Magnetics in Japan, IEEE Translation Journal on
DOI :
10.1109/TJMJ.1987.4549595
