Patent ID: 6620499
Filing Date: 2003-09-16
Classification: G11B,Y10T

Abstract:
A magnetic recording medium having on a support a non-magnetic layer comprising a non-magnetic powder dispersed in a binder resin and on the non-magnetic layer a magnetic layer comprising a ferromagnetic powder dispersed in a binder resin, wherein said ferromagnetic powder is a hexagonal (system) ferrite magnetic powder having an average tabular diameter of 10 to 35 nm and a coercive force (Hc) of 135 to 400 kA/m, and said magnetic layer has a coercive force (Hc) of 135 to 440 kA/m, an anisotropic magnetic field of at least 358 kA/m and a rotational hysteresis loss integral of 0.5 to 0.95.