| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium which is useful in use respectially in an HDD, whose coercive force is high, and also whose recording density is high. SOLUTION: This magnetic recording medium is provided with a nonmagnetic substrate 1, and a nomagnetic substrate layer 2 and a magnetic layer 3 which are formed sequentially on the substrate 1. The substrate layer 2 is composed of nonmagnetic polycrystal particles. The magnetic layer 3 is composed of magnetic CoCr-based alloy particles. At this time, the planar size of the magnetic alloy particles is prescribed by the planar size of the polycrystal particles, and it is constituted to be at 20 nm or lower. |
