| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium which is free of a shift and annihilation of write signals even under high-density recording conditions. SOLUTION: Nitrides of at least one kind of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, B, Al or Si are uniformly dispersed and incorporated at a concentration of >=1 to <=20% into an amorphous film of a rare earth-transition metal alloy constituting a magnetic recording layer. As a result, good magnetic characteristics can be obtained even under the high-density recording conditions. Ground surface layers consisting of single or a plurality of layers and magnetic domain control layers designed to control the magnetic domains of a soft magnetic backing layer are imparted between a nonmagnetic substrate and the soft magnetic backing layer, by which the spike noise occurring in the formation the domain wall of the soft magnetic backing layer can be suppressed.
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