| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium that can achieve an improvement in coercive force Hc and an SNR of a magnetic recording layer, thereby achieving a further increase in recording density, and further to provide a method of manufacturing the perpendicular magnetic recording medium. SOLUTION: The perpendicular magnetic recording medium 100 has, over a substrate, at least a magnetic recording layer 122 with a granular structure in which nonmagnetic grain boundaries are formed between magnetic grains continuously grown into a columnar shape. The magnetic grains of the magnetic recording layer 122 contain Co, Cr, and Pt. The magnetic recording layer 122 contains at least one oxide selected from a group A including SiO<SB>2</SB>, TiO<SB>2</SB>, and Cr<SB>2</SB>O<SB>3</SB>, at least one oxide selected from oxides of a group B consisting of oxides each having a larger Gibbs free energyΔG than the group A, and a reducing agent adapted to reduce the oxides of the group B. COPYRIGHT: (C)2011,JPO&INPIT |
