Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1987-03-06
1989-01-10
Thibodeau, Paul J.
Stock material or miscellaneous articles
Composite
Of inorganic material
428702, 428900, G11B 564
Patent
active
047973307
ABSTRACT:
A perpendicular magnetic storage medium comprising a substrate and a perpendicular magnetic anisotropic film formed on the substrate, characterized in that the perpendicular magnetic anisotropic film is a film of a sub-oxide of a metal having a composition described by a general formula [(Fe.sub.1-x Co.sub.x).sub.1-y M.sub.y ].sub.1-z O.sub.z [where 0.01.ltoreq.x.ltoreq.0.75, 0.ltoreq.y.ltoreq.0.30, 0.05.ltoreq.z.ltoreq.0.50 and M means at least one metal excluding Fe and Co.]; and has an easy magnetization axis being perpendicular to a plane thereof, and both a peak of diffracted X-ray intensity caused by oxidized Fe and a peak of diffracted X-ray intensity caused by metal state Fe and Co and Metal M observed in X-ray diffraction spectrum.
The perpendicular magnetic storage medium of the present invention can be produced easily and economically at a low substrate temperature, and has high wear resistance, high recording/reproducing sensitivity and high recording density.
REFERENCES:
patent: 4362767 (1982-12-01), Nouchi et al.
patent: 4661418 (1987-04-01), Yanai et al.
M. Ohkoshi et al., IEEE Transaction on Magnetics, vol. MAG-20, No. 5, Sep. 1984, pp. 788-790.
K. Nakamura et al., Japanese Journal of Applied Physics, vol. 23, No. 6, Jun. 1984, pp. L397-L399.
N. Akutsu et al., IEEE Transaction on Magnetics, vol. MAG-22, No. 5, Sep. 1986, pp. 1170-1172.
Nasu Shogo
Saiki Koji
Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha
Thibodeau Paul J.
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