Magneto-optical recording medium and a method using the same

Details Magneto-optical recording medium and a method using the same Magneto-optical recording medium and a method using the same

1994-02-14

1997-02-18

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694MM, 428694EC, 428694GR, 428694RL, 428694DE, 428336, 428900, 360 59, 360114, 365122, 369 13, 369 14, 369 54, 369 59, 369116, 369121, 369122, 369124, G11B 566

Patent

active

056040466

ABSTRACT:
This specification discloses a magneto-optical recording medium in which on the opposite side of a second magnetic layer having a relatively low curie temperature and a relatively great coercive force, there are laminated a first magnetic layer and a third magnetic layer each having a relatively high curie temperature and a relatively small coercive force as compared with the second magnetic layer, the second magnetic layer has its curie temperature varying in the direction of film thickness thereof and has a curie temperature T.sub.L1 near the interface thereof with the first magnetic layer and has a curie temperature T.sub.L3 near the interface thereof with the third magnetic layer, and T.sub.L1 .noteq.T.sub.L3, and the first magnetic layer, the second magnetic layer and the third magnetic layer are coupled together at room temperature by the exchange interaction therebetween and a state in which the direction of magnetization of the first magnetic layer and the direction of magnetization of the third magnetic layer are anti-parallel to each other is a stable state. The specification also discloses a magneto-optical recording method using such magneto-optical recording medium.

REFERENCES:
patent: 4556291 (1985-12-01), Chen
patent: 4649519 (1987-03-01), Sun et al.
patent: 4855975 (1989-08-01), Akasaka et al.
patent: 4878132 (1989-11-01), Aratani et al.
patent: 5132945 (1992-07-01), Osato et al.
patent: 5163031 (1992-11-01), Osato

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