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

摘要

A magnetic recording medium that can show good running performance during use is provided. This magnetic recording medium is a taped magnetic recording medium and comprises a substrate, a base layer, arranged on the substrate,and a magnetic layer arranged on the base layer. On the surface of the magnetic layer, depths of 20% or more of the average thickness of the magnetic layer are formed in a ratio of 20 or more and 200 or less per 1600 m2. On the surface of the magnetic layer, a logarithm determined at a temperature of 10oC or higher and 45oC or lower by means of a pendulum viscosity test shall be:Deactivation rate 0025 or more and 0040 or less. A difference between a maximum value of the logarithmic cut-off rate and a minimum value of the logarithmic cut-off rate is 0 or more and 0020 or less. The rectangular relation in the vertical direction is 65% or more. The average thickness of the magnetic layer is 80 nm or less. The average thickness of the magnetic recording medium is 5,6 m m or less.