Dynamic magnetic information storage or retrieval – Head – Read only detector using light for reading magnetically...
Patent
1978-08-14
1980-05-06
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Head
Read only detector using light for reading magnetically...
75123E, 75152, 148 3157, 148108, G11B 532, G11C 1304
Patent
active
042020220
ABSTRACT:
A magnetic transfer record film employed for magneto-optically reading magnetic record patterns. The magnetic transfer record film is formed, as the principal component, of an alloy of a heavy rare earth metal and a transition metal and has an easy axis of magnetization in a direction perpendicular to the film surface and further has an alloy composition included in a range of .+-.10% at the periphery of a center alloy composition where the saturation magnetic moment becomes minimum with respect to a change of the composition within a temperature range used. The magnetic transfer record film is deposited on a transparent substrate and positioned closely to a magnetic record medium on which a magnetic record pattern to be observed is stored, so that the magnetic record pattern is transferred to the magnetic transfer record film. An optical system is provided to magneto-optically read out the transferred magnetic record pattern from the magnetic transfer record film.
REFERENCES:
patent: 3102002 (1963-08-01), Wallace et al.
patent: 3124490 (1964-03-01), Schmekenbecher
patent: 3472708 (1969-10-01), Schindler et al.
patent: 3475738 (1969-10-01), Louis et al.
patent: 3615911 (1971-10-01), Nesbitt et al.
patent: 3626394 (1971-12-01), Nelson et al.
patent: 3636535 (1972-01-01), Cushner et al.
patent: 3665431 (1972-05-01), Alstad et al.
patent: 3676867 (1972-07-01), Bacon et al.
patent: 3739362 (1973-06-01), Eschelbach
patent: 3816237 (1974-06-01), Barrall et al.
patent: 3856513 (1974-12-01), Chen et al.
patent: 3949351 (1976-04-01), Clark et al.
Imamura Nobutake
Kobayashi Toshihiko
Mimura Yoshinori
Adams Bruce L.
Burns Robert E.
Eddleman Alfred H.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
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