Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-12-16
Phys. Rev. B 80, 045122 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
published version, 10 pages, 6 figures
Scientific paper
10.1103/PhysRevB.80.045122
We theoretically investigate the anomalous Hall effect in a system of dense-packed ferromagnetic grains in the metallic regime. Using the formalism recently developed for the conventional Hall effect in granular metals, we calculate the residual anomalous Hall conductivity $\sigma_{xy}$ and resistivity $\rho_{xy}$ and weak localization corrections to them for both skew-scattering and side-jump mechanisms. We find that, unlike for homogeneously disordered metals, the scaling relation between $\rho_{xy}$ and the longitudinal resistivity $\rho_{xx}$ does not hold. The weak localization corrections, however, are found to be in agreement with those for homogeneous metals. We discuss recent experimental data on the anomalous Hall effect in polycrystalline iron films in view of the obtained results.
Efetov Konstantin B.
Kharitonov Maxim Yu.
Meier Hendrik
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