Perpendicular magnetic recording medium and method for manufacturing the same

摘要

Provided are a perpendicular magnetic recording medium and a method for manufacturing the same, the perpendicular magnetic recording medium including an alloy (FePt, FePd, or CoPt) having a large Ku value with an L10 type ordered structure, and obtained with achievement of controlled crystal orientation and thin film formation without heating. Specifically, in the perpendicular magnetic recording medium, at least a nonmagnetic seed layer, a nonmagnetic underlayer, and a magnetic layer are formed in this order on a nonmagnetic substrate. The nonmagnetic seed layer includes a MgO layer and a metal layer having a body-centered cubic (bcc) structure. The nonmagnetic underlayer has a NaCl type structure of one selected from the group consisting of MgO, NiO, TiO, CrN, Ti carbides, and Ti nitrides. The magnetic layer includes an alloy selected from the group consisting of FePt, FePd, and CoPt having an L10 type ordered structure.

主权项

1. A perpendicular magnetic recording medium comprising:
a nonmagnetic seed layer, a nonmagnetic underlayer, and a magnetic layer formed in this order on a nonmagnetic substrate, wherein the nonmagnetic seed layer includes a MgO layer in direct contact with a metal layer thereon having a body-centered cubic (bcc) structure, the nonmagnetic underlayer has a NaCl type structure of one selected from the group consisting of MgO, NiO, TiO, CrN, Ti carbides, and Ti nitrides, the nonmagnetic underlayer being disposed directly on the nonmagnetic seed layer, and the magnetic layer includes an alloy selected from the group consisting of FePt, FePd, and CoPt having an L10 type ordered structure.