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Proceedings Paper

The effect of different cooling processes on the microstructure and magnetic properties of FePt single layer films
Author(s): Kai-feng Dong; Xia-fei Yang; Xiang-shui Miao; Xiao-hong Xu; Xiao-min Cheng; Fang Wang; Jun-bing Yan; Wei-ming Cheng
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Paper Abstract

The FePt single layer films with different thickness were deposited by RF magnetron sputtering on glass and Corning glass substrates, and the L10-FePt films were obtained after the as-deposited samples were subjected to vacuum annealing using different cooling processes. It costs 7 hours for the temperature to decrease from 550 to the room temperature during the natural cooling process, however it just costs 1.5 hours during the fast cooling process.Results show that after annealed at for 1h, the perpendicular coercivity of the FePt single layer films decreases with the increasing of FePt layer thickness, and the FePt 15nm film exhibits a high perpendicular coercivity of 8308 Oe and a low in-plane coercivity of 5141 Oe, which suggests that the film exhibits a high perpendicular anisotropy. The FePt films with nature cooling can obtain larger Mr/Ms values than that with fast cooling.

Paper Details

Date Published: 20 March 2009
PDF: 6 pages
Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71250T (20 March 2009); doi: 10.1117/12.822036
Show Author Affiliations
Kai-feng Dong, Huazhong Univ. of Science and Technology (China)
Xia-fei Yang, Huazhong Univ. of Science and Technology (China)
Xiang-shui Miao, Huazhong Univ. of Science and Technology (China)
Xiao-hong Xu, Shanxi Normal Univ. (China)
Xiao-min Cheng, Huazhong Univ. of Science and Technology (China)
Fang Wang, Shanxi Normal Univ. (China)
Jun-bing Yan, Huazhong Univ. of Science and Technology (China)
Wei-ming Cheng, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7125:
Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage

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