Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1988-04-22
1990-02-27
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
428627, 428635, 428428, 2041922, H01F 1014, G11B 5127
Patent
active
049045431
ABSTRACT:
Magnetic Fe alloy films in which at least nitrogen is compositionally modulated along the thickness of the film substantially in the form of a sine wave. By the compositional modulation, the Fe alloy film having high saturation magnetization is imparted with good resistances to corrosion and wear. The method of making a compositionally modulated Fe alloy film is described. The compositional modulation may be realized by merely superposing at least one nitrided layer and at least one nitride-free layer. The thermal treatment of the superposed layers is effective for the modulation where the content of the nitrogen in the film is compositionally modulated.
REFERENCES:
patent: 4231816 (1980-11-01), Cuomo et al.
patent: 4640755 (1987-02-01), Sato
patent: 4661418 (1987-04-01), Yanai et al.
patent: 4663193 (1987-05-01), Endo et al.
patent: 4698272 (1987-10-01), Inokuti et al.
patent: 4698273 (1987-10-01), Komuro et al.
patent: 4714641 (1987-12-01), Cordts
E. R. Wuori et al., "Nitrogen-Induced fcc Phase in rf Sputtered Co-Cr films having the hcp-Phase and Perpendicular Anisotropy", J. Vac. Sci. Technol., 20(2), Feb. 1982, pp. 171-174.
T. Serikawa, "Permalloy Film Preparation by RF Sputtering", Review of the Electrical Communications Laboratories, vol. 25, Nos. 3-4, Mar.-Apr. 1977, pp. 209-216.
H. W. Potzlberger, "Magnetron Sputtering of Permalloy for Thin-Film Heads", IEEE Transactions of Magnetics, vol. MAG-20, No. 5, Sep. 1984, pp. 851-853.
T. Takahashi, "Metastable F.sub.e Nitrides with High B.sub.s Prepared by Reactive Sputtering", J. Appl. Phys., 53(11), Nov. 1982, pp. 8332-8334.
H. Maeda, "Effect of Nitrogen on the High Coercivity and Microstructures of C.sub.o -Ni Alloy Films", J. Appl. Phys., 53(10), Oct. 1982, pp. 6941-6945.
Osano Koichi
Sakakima Hiroshi
Matsushita Electric - Industrial Co., Ltd.
Zimmerman John J.
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