CoPtCr-SiO_2垂直磁気記録媒体の保磁力角形比と記録再生特性(Selected Papers from the Fourth International Workshop on High Frequency Micromagnetic Devices and Materials(MMDM4))

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The dependence of the coercive squareness S^* on the recording characteristics of CoPtCr-SiO_2 perpendicular magnetic recording media was investigated. Experimental results showed that the magnetic cluster size d_<cl>, which is evaluated by observing the ac-erased magnetization pattern of media, decreased with a decrease in S^*. Ac-erased noise increased with an increase in S^*. At a recording density of 1000 kfci, the S/N of a medium with S^* of 0.39 was 5dB higher than that of a medium with S^* of 0.44. The recording magnetization pattern was obtained for a medium with S^* of 0.39 at a high recording density of 1300 kfci. Thermal decay of the medium became very small for S^* of less than 0.37. It was concluded that S^* was effective parameter on the recording characteristics of CoPtCr-SiO_2 perpendicular magnetic recording media.
社団法人日本磁気学会の論文
2006-11-01