Patent ID: 6221519
Filing Date: 2001-04-24
Classification: G11B,Y10S

Abstract:
A magnetic recording medium comprising:a plastic substrate;a nickel oxide underlayer formed on said substrate; anda cobalt-containing maghemite thin film formed on said nickel oxide underlayer, containing cobalt at a molar ratio of cobalt to iron of 0.01:1 to 0.1:1, and having either a spacing of a plane (311) of not more than 2.510 .ANG., a spacing of a plane (222) of not more than 2.415 .ANG. or a spacing of a plane (220) of not more than 2.950 .ANG.,a ratio value of an X-ray diffraction pattern peak intensity of either of the planes (311), (222) and (220) of said cobalt-containing maghemite thin film to an X-ray diffraction pattern peak intensity of the plane (400) thereof being more than 0.5.