Scaling of the anomalous Hall effect in SrRuO3
Abstract
Being one of the most intriguing manifestations of a transport phenomenon that is sensitive to spin and topology, the anomalous Hall effect (AHE) is at the focus of considerable theoretical and experimental efforts. SrRuO3 has played a pivotal role in the study of the AHE and numerous attempts have been made to elucidate its complicated behavior. By using SrRuO3 films with a wide range of thicknesses that vary considerably in the temperature-dependence of their resistivity, we show that the AHE scales with resistivity. The scaling provides a compelling piece of evidence that resistivity, irrespective of its sources or nature (elastic or inelastic), determines the AHE of SrRuO3 in the entire ferromagnetic phase. This observation strongly suggests that changes in Berry phase due to assumed temperature-dependent exchange splitting cannot explain the complicated temperature dependence of the AHE. On the other hand side jumps mechanism combined with Karplus-Luttinger (Berry phase) mechanism that takes into account effects of finite scattering time may explain the observed behavior.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- February 2012
- Bibcode:
- 2012APS..MAR.V9001H