FePt nanocomposite films for optical-magnetic hybrid recording media

F. J. Yang; Hao Wang; H. B. Wang; X. Cao; J. A. Wang; S. X. Xue; Y. Gao; Z. B. Huang; J. Feng; Z. Y. Li

doi:10.1117/12.649614

15 September 2005 FePt nanocomposite films for optical-magnetic hybrid recording media

F. J. Yang, Hao Wang, H. B. Wang, X. Cao, J. A. Wang, S. X. Xue, Y. Gao, Z. B. Huang, J. Feng, Z. Y. Li

Proceedings Volume 5966, Seventh International Symposium on Optical Storage (ISOS 2005); 59660I (2005) https://doi.org/10.1117/12.649614
Event: Seventh International Symposium on Optical Storage (ISOS 2005), 2005, Zhanjiang, China

Abstract

FePt/C and FePt/Ag multilayer films have been prepared by pulsed filtered vacuum arc deposition system and subsequent rapid thermal annealing were performed on SiO₂/Si (001) substrates. A strong dependence of coercivity and ordering on C concentration was found in FePt/C films. FePt/C nanoparticles started ordering at 350°C, the longitudinal coercivity got to 8.1 kOe and the saturation magnetization got to 802 emu/cm³ by decreasing C concentration to 21% at 450°. But the coercitity didn't have the same tendency with Ag-doped FePt films. The films with Ag concentration of 22% started ordering at 400°C and the longitudinal coercivity got to 10.6 kOe and the saturation magnetization was 624 emu/cm³ at 500°C. The obtained results suggest that the films might be applicable to optical-magnetic hybrid recording media.

Citation Download Citation

F. J. Yang, Hao Wang, H. B. Wang, X. Cao, J. A. Wang, S. X. Xue, Y. Gao, Z. B. Huang, J. Feng, and Z. Y. Li "FePt nanocomposite films for optical-magnetic hybrid recording media", Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 59660I (15 September 2005); https://doi.org/10.1117/12.649614

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