Dynamic magnetic information storage or retrieval – Head – Core
Patent
1990-12-28
1993-01-26
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Core
G11B 5235
Patent
active
051826909
ABSTRACT:
Additive elements are added to Fe-N soft magnetic thin films along with oxygen, so that the thermal stability is remarkably improved. After annealing treatment at approximately 550.degree. C., it is possible to provide an Fe-N soft magnetic thin film with a low coercive force. Similarly, it is also possible to provide a soft magnetic thin film having a low coercive force by introducing a combination of specific types of additive elements to Fe-N soft magnetic thin films. When oxygen is further added to the film, it is also possible to provide a soft magnetic thin film which has very excellent soft magnetic characteristics and good thermal stability. The soft magnetic thin films of the invention have good soft magnetic characteristics, a high saturation magnetic flux density and good thermal stability. A magnetic head of a metal-in-gap type using the soft magnetic thin film is also described.
REFERENCES:
Arai et al., "Magnetic Properties of Fe-Si Thin Films Sputtered in Mixed Gas Atmospheres", IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 3976-3978.
Patent Abstracts of Japan, vol. 13, No. 132 (E-736) [3480], Mar. 31, 1989 for Japanese Published Application of Dec. 6, 1988.
Patent Abstracts of Japan, vol. 13, No. 338 (E-795) [3686], Jul. 28, 1989 for Japanese Published Application 1-99203 of Apr. 18, 1989.
Aso Koichi
Hayakawa Masatoshi
Hayashi Kazuhiko
Kajiwara Kazuo
Katori Kenji
Heinz A. J.
Sony Corporation
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