Magnetic recording medium having a Co-O magnetic layer, and spec

Details Magnetic recording medium having a Co-O magnetic layer, and spec Magnetic recording medium having a Co-O magnetic layer, and spec

1993-02-23

1994-07-05

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428694T, 428694TS, 428694TP, 428900, 427128, 427131, 427132, 2041922, G11B 500

Patent

active

053266374

ABSTRACT:
A magnetic recording medium is disclosed, wherein a magnetic film comprising a partially oxidized cobalt with its in-plane coercive force not less than 500 Oe is provided on a substrate. Further disclosed are megnetic recording media, wherein there is further provided an underlayer comprising Cr, Fe or an Fe-Co alloy under said magnetic film, and wherein a perpendicular magnetic anisotropic film comprising a partially oxidized metal is further provided on said magnetic film. The magnetic recording media of the present invention are high in recording density and reproduction output, low in noise and high in S/N ratio.

REFERENCES:
patent: 4743348 (1988-05-01), Ando et al.
patent: 4797330 (1989-01-01), Nasu et al.
patent: 5024854 (1991-06-01), Nakamura et al.
patent: 5066552 (1991-11-01), Howard
"Thin Evaporated Films with High Coercive Force", IEEE Transactions On Magnetics, vol. Mag-3, No. 3, Sep. 1967.
"Evaporation Conditions and Magnetic Properties of Co-O Perpendicular Magnetic Films", IEEE Transactions on Magnetics, vol. Mag-20, No. 5 Sep. 1984.
"A New Perpendicular Magnetic Film of Co-O by Evaporation", Japanese Journal of Applied Physics, vol. 23, No. 6, Jun. 1984, pp. L397-L399.

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