Metal treatment – Compositions – Heat treating
Patent
1976-10-19
1978-11-21
Steiner, Arthur J.
Metal treatment
Compositions
Heat treating
75123E, 75152, 75170, 148101, 148103, 148108, C22C 1900, C22C 2800, C22C 3800
Patent
active
041264940
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.
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Imamura Nobutake
Kobayashi Toshihiko
Mimura Yoshinori
Adams Bruce L.
Burns Robert E.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
Steiner Arthur J.
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