Information recording medium with improved perpendicular magnetic anisotropy

摘要

A perpendicular magnetic recording medium including a substrate, a roughness control layer provided on the substrate and having a rough surface with a grain size of 5 to 20 nm and an average roughness (Ra) of 0.2 to 2.0 nm, and an orientation control layer provided on the roughness control layer and containing 30 at % or more of metal solely having an fcc structure. The perpendicular magnetic recording medium further includes a magnetic recording layer having perpendicular magnetic anisotropy provided on the orientation control layer in contact therewith. The magnetic recording layer is formed from a multilayer film composed of ferromagnetic thin films and nonmagnetic thin films alternately stacked.