Patent ID: 8883327

Claim:
A magnetic recording medium, comprising: a magnetic layer disposed on a nonmagnetic substrate, the magnetic layer including magnetic grains made up of a first recording layer and a second recording layer, the first recording layer and the second recording layer having different magnitude of anisotropy field, wherein the first recording layer is disposed closer to the substrate than the second recording layer, a magnetic material of the first recording layer has anisotropy field 1.2 times or more anisotropy field of a magnetic material of the second recording layer, the magnetic material of the first recording layer has saturation magnetization substantially equal to saturation magnetization of the magnetic material of the second recording layer, the magnetic grains at the second recording layer are separated from surrounding magnetic grains at the second recording layer by a nonmagnetic material, and the magnetic grains at the first recording layer are partially separated from surrounding magnetic grains at the first recording layer by the nonmagnetic material.