Magneto-optical disk having zero kerr rotation angle at room tem

Details Magneto-optical disk having zero kerr rotation angle at room tem Magneto-optical disk having zero kerr rotation angle at room tem

1994-09-02

1996-01-30

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 13, 365122, 428694RE, 428694ML, G11B 729, G11B 1304

Patent

active

054886040

ABSTRACT:
A magneto optical disc is provided with: a substrate having a disc shape; and a ferrimagnetic layer formed on the substrate for recording information as a magnetization condition therein, the ferrimagnetic layer comprising material which Kerr rotation angle at a room temperature is substantially zero and which Kerr rotation angle at a predetermined reproducing temperature has a predetermined value other than zero, the predetermined reproducing temperature being higher than the room temperature and lower than a Curie point of the ferrimagnetic layer.

REFERENCES:
patent: 4794560 (1988-12-01), Bell et al.
patent: 5240784 (1993-08-01), Matsumoto
patent: 5317555 (1994-05-01), Takahashi et al.

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