| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium which is excellent in electromagnetic conversion characteristic, is most suitable for digital recording and has large capacity. SOLUTION: (1) The magnetic recording medium is constituted so as to form a magnetic layer consisting essentially of ferromagnetic powder and a binder on a supporting body. In this case, the ferromagnetic powder has 0.01 to 0.18μm average major axis length, 50 to 180Åcrystallite size and 2 to 9 acicular ratio. The magnetic layer has 1700 to 3000 oersted(Oe) coercive force Hc, orientation ratio in the magnetic layer surface is >=0.85 and a squareness ratio in a direction perpendicular to the magnetic layer surface is <=0.30. Further, (2) in the magnetic recording medium, a substrate layer which is substantially nonmagnetic is formed on the supporting body and the magnetic layer in which the ferromagnetic metallic powder is dispersed in the binder and which has 0.02 to 0.5μm thickness is formed thereon. |
