Magneto-optical recording medium

Details Magneto-optical recording medium Magneto-optical recording medium

1998-04-07

2000-09-19

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694SC, 428694NT, 428694RE, 428694MM, 428694EC, 428900, 369 13, G11B 566

Patent

active

06120921&

ABSTRACT:
The magneto-optical recording medium of the present invention has a triple-layer magnetic laminate on the surface side of the substrate, and the magnetic laminate comprises an amplification layer A.sub.1, an exchange coupling control layer C.sub.12 and a recording layer R.sub.2 formed in this order. In the recording of the medium, magnetic domain is formed in the recording layer R.sub.2 and, and in the reproduction of the medium, the magnetic domain in R.sub.2 is copied to A.sub.1 to form a copied magnetic domain simultaneously with the enlarging of the thus formed copied magnetic domain in A.sub.1 by irradiation of a laser beam and application of a reproduction magnetic field. In the present invention, the amplification layer A.sub.1 does not have a compensation temperature higher than room temperature. Curie temperature Tc.sub.A1 of the amplification layer A.sub.1, Curie temperature Tc.sub.C12 of the exchange coupling control layer C.sub.12, and Curie temperature Tc.sub.S12 of the switching layer S.sub.12 are either Tc.sub.A1 <Tc.sub.C12 ; or Tc.sub.S12 is higher than room temperature and Tc.sub.S12 <Tc.sub.A1. Intensity of the reproduced signals are thereby sufficiently increased.

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