Patent Number: 6,310,748

Title: Magnetic thin film magnetic recording medium

Abstract: A ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25.degree. C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.

Inventors: Yamanaka; Kazusuke (Kanagawa, JP), Yamamoto; Tomoo (Hchiohji, JP), Hosoe; Yuzuru (Hino, JP), Inaba; Nobuyuki (Hasuda, JP), Uesaka; Yasutaro (Kokubunji, JP), Futamoto; Masaaki (Kanagawa, JP), Matsuda; Yoshibumi (Odawara, JP), Furusawa; Kenji (Yokohama, JP), Narishige; Shinji (Kanagawa, JP)

Assignee: Hitachi, Ltd.

International Classification: G11B 5/64 (20060101); G11B 005/66 ()

Expiration Date: 10/30/2018