SOME PROPOSALS OF CONFIGURATION AND PREPARATION METHODS FOR Co-Cr PERPENDICULAR MAGNETIC RECORDING MEDIA

概要

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Several configurations and preparation methods of perpendicular magnetic recording tape media have been proposed in this study. Co-Cr thin films with large saturation magnetization M_s and good c-axis orientation could be prepared by two step sputtcring method. The crystallinity of Co-Cr recording layer and Ni-Fe backlayer seemed to be important for perpendicular magnetic recording media with Co-Cr/Ni-Fe double layer. Two step sputtering method was also applicable to improve the crystallinity of not only Co-Cr layer but also Ni-Fe one. The Co-Cr underlayer as ultra-thin as 100Å was very helpful for enhancing the c-axis orientation of Co-Cr crystallites and <111> orientation of Ni-Fe ones. The multilayers composed of Ni-Fe and ultra-thin Co-Cr layers revealed very soft magnetism and excellent <111> orientation for the Ni-Fe layers. These multilayers were properly effective for the hetero-epitaxial growth of Co-Cr recording layer deposited on them. In addition, Co-Zr-Ta amorphous alloy films were also proposed as the backlayer with large M_s and soft magnetic properties. Very thin Ti interlayer deposited of the Co-Cr layer was effective to improve the c-axis orientation of Co-Cr crystallites deposited on it. At last, Fe-Mo-B thin films also were proposed as the top coat and back coat layers with sufficient durability and electrical conductivity.
社団法人映像情報メディア学会の論文
1993-11-11