Victor Company of Japan, Limited

Shin Miyajima

Hideaki Takehara

Yasuo Shibata

A magneto-optical storage medium and overwrite system comprises a first magnetic layer (reading/writing layer) (3), a second magnetic layer (auxiliary layer) (5) and a third magnetic layer (initializing layer) (7), each of which is a rare earth-transition metal alloy, and interface layers (4,6) for isolating magnetic exchange interaction between the magnetic layers, respectively. The second magnetic layer is initialized by the magnetization of the third magnetic layer (7) at room temperature. The first magnetic layer and/or the second magnetic layer is heated by a laser beam (P1) for demagnetization and remagnetization. The demagnetized portion of the second magnetic layer is remagnetized to the opposite direction by the demagnetizing field from the periphery. The demagnetized portion of the first magnetic layer is remagnetized to the same direction of the second magnetic layer.

Magneto-optical storage medium and magneto-optical overwrite system with

A tin-lead alloy for recording media, which consists essentially of from 30 to 70% by weight of tin and the rest being lead.

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Fujisawa, Japan

Shin Miyajima