Patent ID: 8071229

Claim:
Perpendicular magnetic recording media, comprising: a nonmagnetic substrate; a soft magnetic backing layer formed on the nonmagnetic substrate; a seed layer formed on the soft magnetic backing layer; an intermediate layer comprising an alloy with the hcp structure containing 55 at % or more Zn formed on the seed layer, wherein the alloy comprises (i) Zn, (ii) an element with a smaller atomic radius than Zn, selected from the group consisting of Cr and V, and (iii) an element with an atomic radius larger than Zn, selected from the group consisting of Nb, Ta, Dy, and Mo; a magnetic layer formed on the intermediate layer, the magnetic layer comprising an alloy with the hcp structure containing Co, and the Î”Î¸50 value for the orientation plane (0002) of the magnetic layer is between 1.5Â° and 4Â°; and a protective layer formed on the magnetic layer.