Domain observation during direct overwrite on magneto-optical recording films

Suzuki, Yoshio; Ohta, Norio; Takahashi, Masahiko; Yonezawa, Seiji
July 1989
Applied Physics Letters;7/17/1989, Vol. 55 Issue 3, p315
Academic Journal
Domain patterns were observed with a polarized microscope during direct thermomagnetic overwrite at a fixed bias magnetic field. The size of a recorded domain can be changed reversibly by irradiation of laser pulses with various durations. By scanning a rapidly pulsed laser beam on a film, a stripe domain can be written, erased, and manipulated. This technique may be used in a new type of rewritable memory device. These overwrite behaviors can be explained with a model which assumes that an initial domain formed during laser pulse heating shrinks during cooling.


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