| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium having a coercive force and squareness ratio higher than those of the usual perpendicular magnetic recording medium and having a structure to be easily manufactured, and to provide a method for manufacturing the perpendicular magnetic recording medium. SOLUTION: This perpendicular magnetic recording medium has a soft magnetic layer 2, an underlaid layer, a perpendicular magnetic layer 6 and a protecting layer 7 formed in this order on a substrate 1. The underlaid layer has the three-layer structure formed by laminating a Ti-Cr layer 3, a Co-Cr layer 4 and a Ti-Cr layer 5. These layers are continuously formed by a sputtering method by using Ar gas of the same pressure. As a result, the film qualities (film structure) such as the orientation property and crystallinity of the layer 6 are optimized to obtain excellent magnetic characteristics such as larger coercive force and squareness ratio.
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