NdDyFeCo光磁気ディスク媒体における高感度記録膜の開発

概要

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To achieve high-performance of switching-field sensitivity in a magneto-optical disk system using magnetic field modulation, we focused on the study of the characteristics of the first dielectric layer becouse it's performance has the strongest influence on the magnetization characteristics and the reliability of the recording layer. We therefore worked on optimizing the parameters for sputtering control in order to obtain a superior recording performance. At the same time, we were able to confirm that the best results could be obtained by setting the ratio of neodymium at 1.0at% in the composition of the neodymium-dysprosium-iron-cobalt (NdDyFeCo) magnetic layer.By having determined the optimum solutions to fabricating higher performance media, we were able to develop the lower cost, superior-sensitivity magneto-optical disks to be reported here.
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