Determination of the intrinsic anomalous Hall effect of SrRuO3
R. Mathieu, C. U. Jung, H. Yamada, A. Asamitsu, M. Kawasaki, Y. Tokura
Abstract
The anomalous Hall effect (AHE) of epitaxial SrRuO3 films with varying lattice parameters is investigated, and analyzed according to the Berry-phase scenario. SrRuO3 thin films were deposited on SrTiO3 substrates directly, or using intermediate buffer layers, in order to finely control the epitaxial strain. The AHE of the different films exhibits intrinsic features such as the sign change of the Hall resistivity with the temperature, even for small thicknesses of SrRuO3. However, the anomalous Hall conductivity is greatly reduced from its intrinsic value as the carrier scattering is increased when the epitaxial strain is released. We argue that the AHE of fully strained SrRuO3 film with low residual resistivity represents the intrinsic AHE of SrRuO3.
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