Publication Date:
2015-03-06
Description:
Columnar (001) FePt-ZrO 2 -C films with large coercivity, small grain size, and high aspect ratio were obtained. By doping ZrO 2 into FePt film at high sputtering temperature, tetragonal (002) textured ZrO 2 was formed and distributed at the grain boundaries of FePt grains, resulting in the formation of columnar structured FePt films. The perpendicular anisotropy of FePt films was degraded since some (200) FePt grains were formed directly on the (002) textured ZrO 2 . With a small amount of carbon doping into FePt-ZrO 2 35 vol. % films, the perpendicular anisotropy was improved. However, FePt grains were still interconnected. Upon further increasing concentration of ZrO 2 , (001) textured FePt-ZrO 2 40 vol. %-C 5 vol. % films with well isolated grains in average diameter of 5.5 nm and very good columnar structure were obtained.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
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