Improvement of crystallinity and magnetic characteristics of ferromagnetic-Co77Cr20Ta3/paramagnetic-Co65Cr35 bilayered films

In order to improve crystallographic and magnetic characteristics of Co-Cr- Ta recording layers, optimization of substrate temperature T-s for the seed layers was investigated. Crystalline orientation and magnetic characterist ics of the ferromagnetic-Co77Cr20Ta3 layers were improved by adjusting T-s of the paramagnetic-Co-66 Cr-35 Seed layer in the range of 150-200 degrees C, It was found that deposition of the seed layer with excellent c-axis ori entation is effective to enhance perpendicular magnetic anisotropy and to p repare an ultrathin ferromagnetic recording layer. T-s-optimized deposition of the seed layers will be useful for fabricating the perpendicular magnet ic recording media.