Magneto-optical memory medium

Details Magneto-optical memory medium Magneto-optical memory medium

1997-12-08

2000-01-04

Kiliman, Leszek

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428336, 428694ML, 428694MM, 428694EC, 428694DE, 428694SC, 428694LE, 428900, 369 13, G11B 566

Patent

active

060107804

ABSTRACT:
A magneto-optical memory medium is provided, on a substrate, with a first magnetic layer, which shows in-plane magnetization at room temperature and perpendicular magnetization above a certain temperature, and a second magnetic layer, which shows perpendicular magnetization within a range from room temperature up to its Curie temperature. The first magnetic layer is made up of alternating films of rare earth metals and transition metals. As a result, a magneto-optical memory medium can be provided which has a wide reproducing power margin, and which is able to prevent deterioration of characteristics due to repeated laser projection.

REFERENCES:
patent: 5616428 (1997-04-01), Nishimura
patent: 5631096 (1997-05-01), Nakajima
patent: 5656384 (1997-08-01), Nishimura
patent: 5705286 (1998-01-01), Hirokane
patent: 5707727 (1998-01-01), Takahashi
Published unexamined patent application, Tokukaihei 6-150418, May 31, 1994.

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