Patent ID: 6746786
Filing Date: 2004-06-08
Classification: G11B,Y10S

Abstract:
A magnetic recording medium, comprising:a substrate; and a Co-containing spinel-based iron oxide thin film formed on the substrate, comprising magnetite represented by the general formula of FeOxÂ·Fe2O3 (02O3, and having a Co content of 1 to 20 mol % based on Fe, a coercive force value of not less than 159 kA/m (2,000 Oe), a thickness of 5 to 200 nm, a center line average height Ra of 0.1 to 0.8 nm, a maximum height (Rmax) of not more than 10 nm, a surface electrical resistance value of not more than 1.5 M&OHgr; and a saturation magnetization value of 29 to 63 Wb/m3 when measured by applying a magnetic field of 1,590 kAfm (20 kOe) thereto.