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Formation and Stabilization of Nanosize Grains in Ferromagnetic Thin Films by Dispersed C60

Published

Author(s)

L A. Zheng, E V. Barrera, Robert D. Shull

Abstract

A self-assembly grain growth model is proposed to explain the recent observation of the formation of the uniform columnar nanosize grain structures in the ferromagnetic metal-C60 thin films. Calculations of the grain size based on this model comply with the experimental measurement and give a relationship between the grain size and the C60 concentration in these films. Comparative grain growth kinetic studies at 450 C between Co-C60 and Co-films show higher thermal stability and significantly slower grain growth rate in the Co-C60 thin film than those in the Co film. AFM observation shows that the surface of the Co film is coarsened by severe grain growth and formation of surface thermal grooves after annealed at 450 C while the surface of the Co-C60 film maintains smooth due to high thermal stability and slow grain growth in the film. These results indicate that C60 has a dual function of forming and stabilizing the nanosize grains in the metal-C60 films.
Citation
Journal of Applied Physics
Volume
92
Issue
No. 1

Keywords

ferromagnetic thin films, grain growth, kinetic, nanosize grains, thermal stability

Citation

Zheng, L. , Barrera, E. and Shull, R. (2002), Formation and Stabilization of Nanosize Grains in Ferromagnetic Thin Films by Dispersed C<sub>60</sub>, Journal of Applied Physics (Accessed April 22, 2024)
Created June 30, 2002, Updated October 12, 2021