Surface-induced magnetic anisotropy for impurity spins in granular AuFe films

Details Surface-induced magnetic anisotropy for impurity spins in granular AuFe films Surface-induced magnetic anisotropy for impurity spins in granular AuFe films

2001-07-23

arxiv.org/abs/cond-mat/0107460v1

Physica B 294-295 (2001) 302-306

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures, E-mail addresses: devreese@uia.ua.ac.be, fomin@uia.ua.ac.be, gladilin@uia.ua.ac.be

Scientific paper

10.1016/S0921-4526(00)00664-5

The theory of the surface-induced anisotropy is extended to the case of granular films of dilute magnetic alloys. Since the surface-induced blocking of a magnetic-impurity spin appears to be very sensitive to the specific polycrystalline structure, we speculate that the apparent discrepancy between the experimental results of different groups for the size dependence of the Kondo resistivity can be linked to different microstructure of the samples. We apply our model to calculate the magnetization of impurity spins in small AuFe grains and to interpret the experimental data on the anomalous Hall effect in thin Fe doped Au films.

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