Magnetic recording medium having a dimensional variation
摘要
說明書
The inclination angle of the column structure is preferably larger than 0° and not larger than 60°. In the inclination angle range of larger than 0° and not larger than 60°, the tip shape of the column included in the first base layer 132A is largely changed to a substantially triangle shape, and there is thus a tendency to enhance the effect of the granular structure, reduce noise, and improve the SNR. On the other hand, when the inclination angle exceeds 60°, the tip shape of the column included in the first base layer 132A is changed little and unlikely to have a substantially triangular shape, and there is thus a tendency to reduce the low noise effect.
The average particle size of the column structure is 3 nm or more and 13 nm or less. When the average particle size is less than 3 nm, the average particle size of the column structure included in the recording layer 115 is reduced, and there is thus a possibility that the ability of the present magnetic material to retain recording may be degraded. On the other hand, when the average particle size is 13 nm or less, noise is suppressed, thereby allowing a more favorable SNR to be achieved.
