Magnetic recording medium

摘要

Provided is a magnetic recording medium ensuring an adequate S/N even in high density magnetic recording, and tending not to electrostatically damage MR heads during recording and reproduction employing MR heads. A magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder and a binder in this order on at least one side of a nonmagnetic support, wherein said nonmagnetic layer comprises 10 to 50 mass parts of carbon black with a mean particle diameter of 10 to 30 nm per 100 mass parts of said nonmagnetic powder, said magnetic layer has a thickness equal to or less than 0.2 mum, the standard deviation b of the average intensity a of elements due to said ferromagnetic powder as determined by electron-beam microanalysis is 0.03<=b/a<=0.4, and said magnetic layer has a center surface average roughness Ra equal to or less than 5 nm and a ten-point average roughness Rz equal to or less than 50 nm.