Patent ID: 6773788
Filing Date: 2004-08-10
Classification: G11B,Y10T

Abstract:
A magnetic recording medium comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a flexible nonmagnetic support, whereinthe magnetic layer has an average thickness ranging from 0.02 to 0.2 &mgr;m, the ferromagnetic powder contained in the magnetic layer is a plate-shaped hexagonal ferrite ferromagnetic powder having an average plate diameter of 10 to 40 nm, the ratio of a volume of magnetic reversal to a volume of magnetic material particles is equal to or less than 3, the magnetic layer has a coercive force Hc equal to or higher than 159 kA/m, and components magnetically reversing in the magnetic field of 80 kA/m or less are less than 1 percent in the magnetization distribution of the magnetic layer.