Sony Group Corporation
MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING MEDIUM CARTRIDGE

Abstract:

Provided is a magnetic recording medium capable of implementing higher-density recording. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate containing a polyester as a main component and a magnetic layer disposed on the substrate, including a plurality of types of magnetic powder, and capable of recording a data signal. A surface of the magnetic layer has an arithmetic average roughness Ra of 2.5 nm or less. PSD to a spatial wavelength of 5 .mu.m is 2.5 .mu.m or less. The magnetic layer has an average thickness of 90 nm or less. The magnetic powder has an average aspect ratio of 1.0 or more and 3.0 or less. A coercive force in a perpendicular direction is 3000 oersted or less. A ratio of a coercive force in a longitudinal direction to the coercive force in the perpendicular direction is 0.8 or less. A half-value width of an isolated waveform in a reproduced waveform of the data signal is 200 nm or less.