Magneto-optical recording medium having a rave earth-transition

Details Magneto-optical recording medium having a rave earth-transition Magneto-optical recording medium having a rave earth-transition

1994-08-11

1996-12-17

Resan, Stevan A.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428216, 428336, 428446, 428623, 428627, 428629, 428632, 428701, 428704, 428694RE, 428694ML, 428694TP, 428900, 428928, 427131, 427132, 369 13, G11B 572

Patent

active

055851975

ABSTRACT:
In a magneto-optical recording medium having a substrate, a recording layer having at least a rare earth-transition metal alloy film formed on the substrate, and a dielectric layer formed on the recording layer, a depth of penetration in the recording layer for an element derived from the dielectric layer is set to 70.ANG. or less from an interface between the recording layer and the dielectric layer in a depth-directional film structure analysis by an Auger electron spectroscopy. Accordingly, mixing of impurities into the recording layer can be suppressed to thereby lower the value of the required recording magnetic field.

REFERENCES:
patent: 4565734 (1986-01-01), Avai et al.
patent: 4666759 (1987-05-01), Ohkawa et al.
patent: 5019462 (1991-05-01), Steininger
Article by Kim et al from the Journal of Applied Physics, vol. 67, No. 9, May 1, 1990, pp. 5322 through 5324, "Influence on the Magnetic Properties by the Interface Reaction Between a TbCo Thin Film and a Si-Contained Protective Layer".

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