Characterization to realize CoCr-based perpendicular magnetic recording media with high squareness and normalized coercivity

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机构：
[1] Saito, Shin
[2] Hoshi, Fumikazu
[3] Itagaki, Norikazu
[4] 1,Takahashi, Migaku
来源：
Saito, S. (ssaito@ecei.tohoku.ac.jp) | 1600年 / American Institute of Physics Inc.卷 / 93期
关键词：
Cobalt compounds - Coercive force - Sputtering - Thermal effects;
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摘要：
The systematic magnetic characterization for realization of CoCr-based perpendicular magnetic recording media with high squareness and normalized coercivity was discussed. It was found that the with decreasing measuring temperature from R. T. t 4.2 K, normalized coercivity Hc/Hkgrain, increased for the medium strongly influenced by thermal agitation. The analysis showed that an exchange decoupled medium tends to show a large positive Hn/Hkgrain, which resulted in a significant decrease of squareness.
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