Patent ID: 6071607
Filing Date: 2000-06-06
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium for use in a magnetic disk device provided with a magnetoresistive head, said recording medium comprising a nonmagnetic substrate and a magnetic recording film of a magnetic metal material provided through a primer layer of a nonmagnetic metal material on the substrate, wherein the primer layer is formed of a metallic material composed mainly of chromium and molybdenum and the magnetic recording film is formed of a metallic material comprising a four-component alloy having the following composition:chromium: 14 to 25 at %,tantalum: 1 to 7.5 at %,platinum: 2 to 20 at %, andcobalt: balance; andin which the magnetic recording film has a tBr of not more than 120 G..mu.m and a thickness of not more than 30 nm, and the primer layer underlying the magnetic recording film has a thickness of not more than 30 nm and the lattice spacing of the (110) plane thereof is about 1% wider than that of the (001) plane of the magnetic recording film as a function of the varied content of molybdenum in the primer layer.