The effect of different cooling processes on the microstructure and magnetic properties of FePt single layer films

Kai-feng Dong; Xia-fei Yang; Xiang-shui Miao; Xiao-hong Xu; Xiao-min Cheng; Fang Wang; Jun-bing Yan; Wei-ming Cheng

doi:10.1117/12.822036

19 March 2009 The effect of different cooling processes on the microstructure and magnetic properties of FePt single layer films

Kai-feng Dong, Xia-fei Yang, Xiang-shui Miao, Xiao-hong Xu, Xiao-min Cheng, Fang Wang, Jun-bing Yan, Wei-ming Cheng

Author Affiliations +

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71250T (2009) https://doi.org/10.1117/12.822036
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

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.

Citation Download Citation

Kai-feng Dong, Xia-fei Yang, Xiang-shui Miao, Xiao-hong Xu, Xiao-min Cheng, Fang Wang, Jun-bing Yan, and Wei-ming Cheng "The effect of different cooling processes on the microstructure and magnetic properties of FePt single layer films", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71250T (19 March 2009); https://doi.org/10.1117/12.822036

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