Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Patent
1985-02-26
1987-05-19
McCamish, Marion C.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
428668, 428680, 428681, 428694, 428900, 428928, G11B 724
Patent
active
046667890
ABSTRACT:
A multilayer magnetic recording medium including at least one magnetic layer (CMOI) formed of an alloy including one of the group of heavy rare earths and a metal of the group of the first series of transition metals surrounded by at least two dielectric layers.
According to the invention, the magnetic medium is characterized in that it includes means for preventing the diminution of the number of atoms of rare earth participating in the magnetism of the magnetic layer disposed on both sides of the magnetic layer.
Applicable to magnetooptic disks.
REFERENCES:
patent: 4525028 (1985-06-01), Dorschner
patent: 4569881 (1986-02-01), Freese et al.
Mansuripur et al., "Optimum Disk Structures . . . ", IEE Trans, of Mag., vol. MAG 18, Nov. 1982, p. 1241.
Cuomo et al.; IBM Tech. Bull., vol. 16, No. 5, Oct. 1973, p. 1442.
Takahashi et al., "Magneto-Optic Properties of GdTbFe Thin Films", Nov. 1983.
Katayama et al., "Study of High Reliability of the Magneto-Optic Medium with the Multilayer Structure", Nov. 1983.
Bartolini et al., "Optical Disk Systems Emerge", IEEE Spectrum Aug. 1978, p. 20.
Stoffel; "Thin Film Magneto-Optic Read-Write Memory Element", IBM Tech. Dis. Bull., vol. 12 (1), 6/69, p. 209.
Bernstein Pierre
Gueugnon Catherine
Atkinson William M.
Cii Honeywell Bull (Societe Anonyme)
McCamish Marion C.
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