| 摘要 |
PURPOSE:To obtain high coercive force and high squareness ratio by providing a metallic film consisting of a Co-Pt alloy contg. platinum at a specified ratio on the surface of a base plate. CONSTITUTION:A Co-Pt alloy is used as a magnetic metallic film on a base plate and the content of platinum is made 3-20at%. If the platinum content is less than 3at%, the coercive force is small and the film is not suitable for high- density recording. If the content is higher than 20at%, the crystal structure is across the mixed phases of hcp and fct and lacks in stability and therefore the film is not suitable. |
