| 摘要 |
Embodiments in accordance with the present invention provide a perpendicular magnetic recording medium which is easy to record, offers superior thermal stability of recording magnetization, and allows high-density recording. In one embodiment, a perpendicular magnetic layer with controlled magnetic properties is used as a magnetic storage layer of a perpendicular magnetic recording medium, the magnetic properties having been controlled such that an indicator sigmah<SUB>sw </SUB>[%] of the dispersion of magnetization switching fields in the perpendicular magnetic layer and an indicator D<SUB>n </SUB>[nm] of the intensity of exchange interactions, in film surface directions, in the perpendicular magnetic layer satisfy inequalities sigmah<SUB>sw</SUB>/27+D<SUB>n</SUB>/90<1, AND D<SUB>n</SUB>>20. The indicators can be measured using a magnetometer.
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