MAGNETIC RECORDING MEDIUM

摘要

A magnetic recording medium which comprises a substrate and a magnetic layer comprising hexagonal system barium ferrite powder of the formula: BaO.n[Fe2-(a+b+c+d)CoaNibZncTidO3+e] (I) wherein n is a number of 5.5 to 6.0, a through d are each a number of 0.01 to 0.2 and satisfy the equation: (a+b+c)/d = 1 to 10 and e is a number of -0.3 to 0.01, and a non-magnetic particulate powder having a Mohs' hardness of not smaller than 7 in an amount of 1 to 30 % by weight based on the weight of said ferrite powder, in which demagnetization by cooling is suppressed.