Opto-magnetic recording medium having three exchange-coupled mag

Details Opto-magnetic recording medium having three exchange-coupled mag Opto-magnetic recording medium having three exchange-coupled mag

1987-10-30

1989-06-27

Lesmes, George F.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428212, 428336, 428668, 428682, 428694, 428900, 428928, H01F 1006

Patent

active

048429562

ABSTRACT:
There is provided an opto-magnetic recording medium having an exchange-coupled three-layered structure in which a recording layer having a high coercive force and a low Curie temperature at room temperature is sandwiched between read layers having a low coercive force and a high Curie temperature, wherein an iron group auxiliary lattice magnetization dominant rare-earth and iron group amorphous alloy thin film is adopted as the recording layer and the read layers, and directions of spontaneous magnetization of the three layers are parallel to each other.

REFERENCES:
patent: 4347112 (1982-08-01), Togami
patent: 4556291 (1985-12-01), Chen
patent: 4576699 (1986-03-01), Sato et al.
patent: 4693943 (1987-09-01), Kishi et al.
Kobayashi et al. "Magnetization Process of Exchange Coupled Ferrimagnetic Double-Layered Films", Japanese Journal of Applied Physics vol. 20, No. 11, Nov. 1981, pp. 2089-2095.

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