一般注記This study focuses on the fabrication of magnetic recording media oriented CoPt thin films with perpendicular magnetic anisotropy and ease of writability. It has beenfound that Nitrogen gas incorporation during the deposition leads to an improvement in perpendicular coercivity by magnitude of 10 and the reduction in orderingtemperature by 200 C. The increased number of vacancies inside the CoPt lattice is believed to be improving the diffusion speed of Co and Pt atoms during the orderingtransformation. On the other hand, when depositing CoPt films on TiN/MgO(100)underlayer, a good PMA has been observed at 400 oC. It has been assumed thatthe lattice mismatch between TiN and CoPt strains the lattice of A1-CoPt, breaking the symmetry and giving rise to high PMA. Finally, by coupling a magnetically soft CoPt layer on top of the magnetically hard CoPt layer, a 50% reduction in switching field has been achieved in a relatively simple equipment. This study shows agood method to manufacture CoPt films for future high density magnetic recording media.
identifier:oai:t2r2.star.titech.ac.jp:50485964
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受理日（W3CDTF）2021-05-16T23:51:55+09:00
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