| 摘要 |
PURPOSE:To obtain a magnetic recording medium which is suitable for vertical magnetic recording at a high density, has excellent mechanical strength and chemical stability, etc., and has substantial coercive force and reproduced output by forming a magnetic layer of a continuous magnetic layer consisting essentially of an iron oxide having a prescribed characteristic. CONSTITUTION:A magnetic field perpendicular to the surface of targets T1, T2 in a vacuum vessel 1 of a sputtering device is formed to form plasma of a high density between the targets T1 and T2 thereby forming a continuous magnetic layer 10 on a substrate 6. Fe (contg. 1 atom% Co) is used for the target material and Ar+O2 for the gas to be introduced to form a magnetic layer 10 having >=0.5% the ratio of the residual magnetization in the direction perpendicular to the plane of the layer 10 with respect to the residual magnetization in the direction within the plane of said layer and 0.6<=x<=0.95 the ratio (x) of the density of the magnetic layer with respect to the ratio of the crystal having the same comspn. as the compsn. of the layer 10. The magnetic recording medium which is suitable for vertical magnetic recording at a high density, has excellent mechanical strength and chemical stability, etc. and has substantial coercive force and reproduced output is thus obtd. |
