Patent Number: 6,251,532

Title: Magnetic recording medium and magnetic storage device using the same

Abstract: A magnetic recording medium capable of reducing noise and an error rate of the medium comprises a nonmagnetic substrate; a magnetic layer formed on the surface of the nonmagnetic substrate directly or through a nonmagnetic underlayer; and a protective layer formed on the magnetic layer. The magnetic recording medium satisfies the following relationships: -0.5.ltoreq.{Hc(1)-Hc(p)}/Hc(1).ltoreq.0.3 Hc(1).gtoreq.2 kOe 20 G.times..mu.m.ltoreq.Br(1).times.t.ltoreq.100 G.times..mu.m where Hc(1) is a corecivity of the magnetic layer measured in the longitudinal direction; Hc(p) is a coercivity of the magnetic layer measured in the perpendicular direction; Br(1) is a remanent magnetization of the magnetic layer measured in the longitudinal direction; and "t" is a layer thickness of the magnetic layer.

Inventors: Futamoto; Masaaki (Tsukui-gun, JP), Inaba; Nobuyuki (Hasuda, JP), Yamamoto; Tomoo (Hachiouji, JP), Igarashi; Masukazu (Kawagoe, JP), Hosoe; Yuzuru (Hino, JP), Ishikawa; Akira (Kodaira, JP)

Assignee: Hitachi, Ltd.

International Classification: C22C 27/00 (20060101); C22C 27/06 (20060101); G11B 5/64 (20060101); G11B 5/66 (20060101); B32B 015/01 (); B32B 015/04 (); G11B 005/127 ()

Expiration Date: 06/26/2018