Patent ID: 6709768
Filing Date: 2004-03-23
Classification: G11B,Y10T

Abstract:
A perpendicular magnetic recording medium comprising:a substrate, a magnetic layer composed of cobalt-containing magnetic crystal grains with hexagonal closed-packed (hcp) structure, which is formed above said substrate, wherein; the value of &Dgr;D/Ã—R is no greater than 0.02, and a full width at half maximum of a distribution of angles of which the (00.1) plane makes with the surface of the substrate is no smaller than 8 degrees, wherein said  is an average grain size of said magnetic grains, said &Dgr;D is a standard deviation of the distribution of the size of said magnetic crystal grains, and said R is the stacking fault density of said magnetic layer; said value of &Dgr;D/ is no greater than 0.4; the value of R is no greater than 0.05.