Overwrite capable magneto-optical recording medium having three

Details Overwrite capable magneto-optical recording medium having three Overwrite capable magneto-optical recording medium having three

1995-03-28

1996-07-16

Kiliman, Leszek

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Web or sheet containing structurally defined element or...

Physical dimension specified

428694EC, 428694MM, 428900, 369 13, 3692752, 3692753, 360114, 365122, G11B 566, B32B 516

Patent

active

055365701

ABSTRACT:
A magneto-optical recording medium capable of overwriting by light modulation comprises a substrate, a first magnetic layer having a curie point T.sub.1 and a coercive force H.sub.1, a second magnetic layer having a curie point T.sub.2 and a coercive force H.sub.2, and a third magnetic layer having a curie point T.sub.3 and a coercive force H.sub.3. The first, second and third magnetic layers are successively laminated on the substrate. The first magnetic layer, the second magnetic layer and the third magnetic layer each are vertically magnetized film composed chiefly of an amorphous alloy of rare earth elements and transition metal elements, and satisfy the following conditions:

REFERENCES:
patent: 4664977 (1987-05-01), Osata et al.
patent: 4675767 (1987-06-01), Osato et al.

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