Perpendicular magnetic recording medium and method of making...

Details Perpendicular magnetic recording medium and method of making... Perpendicular magnetic recording medium and method of making...

G - Physics

11

B

352/31

G11B 5/70 (2006.01) G11B 5/66 (2006.01) H01F 10/14 (2006.01)

Patent

CA 1255000

ABSTRACT OF THE DISCLOSURE A magnetic recording medium suitable for use in a single-pole type recording system utilizing a perpendicular magnetization mode, the medium including a nonmagnetic base, a low coercive force layer on the base, and a magnetic recording layer overlying the low coercive force layer. The magnetic recording layer has an easy axis of magnetization perpendicular to the nonmagnetic base. The nonmagnetic base is composed of a material which is stable at a temperature of 220°C and higher. In accordance with the invention, the low coercive force layer is an iron-nickel alloy containing about 82 to 89.5 by weight nickel, the low coercive force layer resulting from vapor phase deposition of the alloy on the nonmagnetic base while the temperature of the base is at least 220°C.

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