Perpendicular magnetic recording medium, its fabrication method

Details Perpendicular magnetic recording medium, its fabrication method Perpendicular magnetic recording medium, its fabrication method

1989-03-09

1993-09-14

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428611, 428655, 428668, 428900, 428928, G11B 566

Patent

active

052447510

ABSTRACT:
There is disclosed a perpendicular magnetic recording medium having a magnetic layer comprising magnetic metal corpuscles and their oxide formed on a nonmagnetic substrate, and having perpendicular magnetic recording read-write characteristics improved by dispersing the above described magnetic metal corpuscles in the oxide crystal having a NaCl type crystal structure so that the magnetic metal corpuscles may have an isotropic structure instead of a columnar structure. There are also disclosed a method for fabricating such a perpendicular magnetic recording medium and a read-write machine using such a perpendicular magnetic recording medium. Further, there are disclosed a perpendicular magnetic recording medium having perpendicular magnetic recording read-write characteristics improved by applying heat treatment to the magnetic layer in a nonreducing atmosphere, a method for fabricating such a perpendicular magnetic recording medium and a read-write machine using such a perpendicular magnetic recording medium.

REFERENCES:
patent: 4726988 (1988-02-01), Oka et al.
patent: 4987039 (1991-01-01), Daimon et al.
IEEE Trans. Magn. Mag-14, p. 849 (1978).
Journal of the Japan Society of Applied Magnetics, vol. 11, No. 2 1987, p. 61.
Japanese Journal of Applied Physics vol. 23, No. 6, Jun. 1984 pp. L397-L399.

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