| 摘要 |
In a longitudinal magnetic recording medium and a method to manufacture the medium, employing a granular magnetic layer minimizes magnetic particles, resistance to thermal fluctuation is superior, and as a result, SNR is enhanced. The longitudinal magnetic recording medium includes a nonmagnetic underlayer, a nonmagnetic intermediate layer, a magnetic stabilizing layer, a nonmagnetic metallic spacer layer, a magnetic layer, a protective film layer, and a liquid lubricant layer, which are sequentially laminated on a nonmagnetic substrate. The magnetic layer has a granular structure including ferromagnetic crystal grains with a hexagonal closest packed structure and a nonmagnetic grain boundary region surrounding the grains and including an oxide. The stabilizing layer and the magnetic layer are antiferromagnetically coupled to one another through the spacer layer.
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