Magnetic and magneto-optical properties of Co-Pt alloy films before and after vacuum annealing

Ming Li; Zhihong Jiang; Defang Shen; Qinwo Shen

doi:10.1117/12.251981

20 September 1996 Magnetic and magneto-optical properties of Co-Pt alloy films before and after vacuum annealing

Ming Li, Zhihong Jiang, Defang Shen, Qinwo Shen

Proceedings Volume 2890, Optical Recording, Storage, and Retrieval Systems; (1996) https://doi.org/10.1117/12.251981
Event: Photonics China '96, 1996, Beijing, China

Abstract

Co-Pt alloy films with perpendicular magnetic anisotropy and 100 percent remanence ratio were successfully prepared using e-beam coevaporation. A series of vacuum annealing was done on these alloy samples to study their thermal stability. The experimental results were as follows: a) For annealing temperature at 200 to approximately 300 degrees C, the Kerr rotation angle was almost unchanged or presented a slow decrease with the lasting of annealing, and the increase in coercivity was also small; b) For annealing temperature above 300 degrees C, both coercivity and Kerr rotation angle dropped prominently, and in the mean time magnetization became partly in-plane; c) Thermal stability is also probably a problem that needs to be solved for CoPt alloy films. The change of magnetic and magneto-optical properties of Co-Pt alloy films during annealing was considered to be related to the strength variation of different textures in films.

Citation Download Citation

Ming Li, Zhihong Jiang, Defang Shen, and Qinwo Shen "Magnetic and magneto-optical properties of Co-Pt alloy films before and after vacuum annealing", Proc. SPIE 2890, Optical Recording, Storage, and Retrieval Systems, (20 September 1996); https://doi.org/10.1117/12.251981

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