G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 5/716 (2006.01) G11B 5/66 (2006.01) G11B 5/706 (2006.01)
Patent
CA 2070070
A magnetic recording medium comprises a nonmagnetic substrate (1), and a magnetic layer consisting of a first ferromagnetic metal thin film (2) of an orthorhombic, columnar structure formed on the nonmagnetic substrate (1), and a second ferromagnetic metal thin film (3) of an orthorhombic, columnar structure. The direction of growth of the orthorhombic, columnar structure of the first ferromagnetic metal thin film (2) and that of the second ferromagnetic metal thin film (3) are opposite to each other. The thickness of the first ferromagnetic metal thin film, the thickness of the second ferromagnetic metal thin film, the coercive force and remanent magnetic flux density of the magnetic layer, the longitudinal stiffness and surface roughness of the back surface of the magnetic recording medium are determined selectively so that the magnetic recording medium is able to function satisfactorily regardless of the direction of movement of the magnetic head relative to the magnetic recording medium in reproducing recoiled data by a recording/reproducing apparatus of a nontracking data reproducing system and a nonloading tape drive system.
Arai Takeo
Ebine Yoshihito
Ito Jota
Kudo Hiroshi
Sasaki Toshikazu
Gowling Lafleur Henderson Llp
Sony Corporation
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