| abstract |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium having excellent thermal stability and electromagnetic conversion characteristics. SOLUTION: The magnetic recording medium 10 has a layer structure having a magnetic layer 13 containing magnetic powder, a base layer 12, a base layer 11 and a back layer 14 in this order, and the average thickness t T of the magnetic recording medium is 5. It is .6 μm or less, the ratio of (average thickness of magnetic layer + average thickness of base layer + average thickness of back layer) / (average thickness of magnetic recording medium) is 0.19 or more, and the base layer is polyester. includes, and is thermostable K u V act / k B T of the magnetic recording medium 63 or more, an average grain volume of the magnetic powder is at 500 nm 3 or more 2300 nm 3 or less, the magnetic interaction ΔM is a special value Have. [Selection diagram] FIG. 7 |