MAGNETICAL INDICATION, MAGNETICAL INDICATION/ REPORTING DEVICE AND CASE FOR MAGNETICAL INDICATION

摘要

A magnetic recording medium showing good running performance during an operation shall be provided. This magnetic recording medium is a tape-shaped magnetic recording medium and includes a substrate, a base layer arranged on the substrate, and a magnetic layer arranged on the base layer. The substrate contains a polyester as the main component. The average thickness of the base layer is 0.9 m m or less. The base layer and the magnetic layer each contain a sliding agent. The magnetic layer has a surface with a large number of holes,and the arithmetic mean roughness Ra of the surface is 2,5 nm or less. The specific surface according to BET of the total magnetic recording medium is 3,5 m2/g or more in a state where the lubricant has been removed from the magnetic recording medium and the magnetic recording medium has been dried. The rectangular relation in the vertical direction is 65% or more. The average thickness of the magnetic layer is 90 nm or less. The average thickness of the magnetic recording medium is 5,6 m m or less.