Magneto-optical recording medium

Details Magneto-optical recording medium Magneto-optical recording medium

1994-12-05

1997-01-14

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694DE, 428694RE, 428694NF, 428694AH, 428694XS, 428336, 2041921, 2041922, 20419232, 20419226, 2041923, G11B 566

Patent

active

055937896

ABSTRACT:
This invention has for its object to provide a magneto-optical recording medium at low costs, which is high in magnetic field sensitivity and reliability, and enables high C/N to be obtained even at high linear velocity.
The magneto-optical recording medium of this invention includes on a substrate a first dielectric film, a recording film of a rare earth element-transition element alloy (including Fe), a second dieleetric film containing a metal element M and nitrogen N and a reflective film. In this medium, the recording film is up to 65 nm in thickness, and the respective diffusion indices of oxygen, nitrogen and metal element M in the vicinity of the boundary between the second dielectric and recording films are within the predetermined ranges, when the element distribution is measured by Auger electron spectroscopy under the predetermined conditions. The maximum value of the oxygen content in the vicinity of said boundary is 5 to 25 at %.

REFERENCES:
Recording Field Sensitivity of Magento-Optical Disks Using Very Thin Exchange-Coupled Films; Ichitani et al.
Proceedings of Magneto-Optical Recording International Symposium '92; pp. 196-200.

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