Opto-magnetic recording medium having plurality of exchange-coup

Details Opto-magnetic recording medium having plurality of exchange-coup Opto-magnetic recording medium having plurality of exchange-coup

1992-02-03

1993-07-06

Wyszomierski, George

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428678, 428681, 428627, H01F 1006, H01F 1016

Patent

active

052252892

ABSTRACT:
There is disclosed an opto-magnetic recording medium which comprises a substrate, a first magnetic layer of a Gd-Fe-Co amorphous alloy formed on the substrate and having iron group sublattice magnetization superiority, saturated magnetization of which falls within the range of 25 to 125 emu/cm.sup.3, and a second magnetic layer of an R-Fe-Co (wherein R is at least one element selected from the group consisting of Tb and Dy) amorphous alloy having a higher coercive force than that of the first magnetic layer, a lower Curie point than that, and rare earth group sublattice magnetization superiority, saturated magnetization of which falls within the range of 25 to 175 emu/cm.sup.3, and in which second magnetic layer is exchange-coupled with the first magnetic layer.

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Patents Abstracts of Japan, vol. 10, No. 300 (1986) 162 P 506, 61-117747.
Patent Abstracts of Japan, vol. 8, No. 92 (1984) 14 P 271, 59-5450.
J. Mag. Soc. J., vol. 11, Supp., No. S1 (1987) 329:32.

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