| 摘要 |
A magnetic recording medium for use with an MR head for the reproduction of recorded signals, the medium having a magnetic layer formed of at least a ferromagnetic powder and a binder supported on a non-magnetic substrate, characterized in that the magnetic layer is from 0.02 to 0.08 mu m thick, and that the product of t and Br, where Br is the residual magnetic flux density (in T) and t is the thickness (in mu m) of the layer, is in the range of 50 x 10<-4> to 160 x 10<-4> and the coercive force of the layer is no less than 166 kA/m (2100 Oe). The magnetic layer has a centerline average roughness Ra of 3 to 7 nm. The ferromagnetic powder is a ferromagnetic metal powder. The residual magnetic flux density Br of the magnetic layer is between 1000 x 10<-4> and 5000 x 10<-4> T. |
