MAGNETIC RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a magnetic recording medium suitable for high-density magnetic recording. SOLUTION: At least two layers of underlying films 102, 103 are formed on a nonmagnetic substrate 101, then a magnetic film 104 having a hcp structure is formed thereon. The magnetic film consists of a polycrystalline film of an alloy essentially comprising Co and containing at least one kind of nonmagnetic element. The polycrystalline film has >=5 nm and <=15 nm average grain size and inhomogeneously precipitated layers having 25 at.% nonmagnetic element formed on the grain boundary. The first underlying film 103 adjacent to the magnetic film 104 with a hcp structure is a nonmagnetic or a weak magnetic film having <=100 emu/cc magnetization. The second underlying film 102 has a bcc structure or NaCl structure and has <100> or <211> dominant orientation direction.