Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

C - Chemistry, Metallurgy

23

C

117/24.3

C23C 14/16 (2006.01) C23C 14/24 (2006.01) G11B 5/64 (2006.01) G11B 5/66 (2006.01) H01F 10/16 (2006.01)

Patent

CA 1255972

ABSTRACT OF THE DISCLOSURE Disclosed herein is a magnetic recording medium having a ferromagnetic metal layer formed by phisical vapour deposition. The magnetic recording medium has anisotropic magnetic characteristics along a surface of the ferromagnetic metal layer, where both coercive force and rectangular ratio are high. The magnetic recording medium comprises a non-magnetic substrate and a magnetic layer having anisotropic magnetic characteristics along a surface of the magnetic layer formed on the non-magnetic substrate. The magnetic layer is composed of Co or Co-Ni alloy having a composition represented as Co100-xNix, where x standing for atomic percent of nickel, and is composed of f.c.c. crystal phase and h.c.p. crystal phase. Ratio of the two phases is defined as y = f.c.c. phase/(f.c.c. phase + h.c.p. phase) x 100 volume percent, wherein values of x and y satisfying to be in an area on Cartesian coordinate surrounded by lines Y = 40 + 0.8x, Y = 10 + x, x = 0 and x = 50.

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