Anomalous Hall effect in anatase Ti1-xCoxO2 at low temperature regime

Details Anomalous Hall effect in anatase Ti1-xCoxO2 at low temperature regime Anomalous Hall effect in anatase Ti1-xCoxO2 at low temperature regime

2007-01-17

arxiv.org/abs/cond-mat/0701395v2

Applied Physics Letters, 90, 072103 (2007)

Physics

Condensed Matter

Materials Science

3 pages, 4 figures; modified Refs. 9 and 13 according to journal's queries, and modified some sentences related on sample comp

Scientific paper

10.1063/1.2834247

Anomalous Hall effect (AHE) of a ferromagnetic semiconductor anatase \cotio thin film is studied from 10K to 300K. Magnetic field dependence of anomalous Hall resistance is coincident with that of magnetization, while the anomalous Hall resistance decreases at low temperature in spite of nearly temperature-independent magnetization. Anomalous Hall conductivity sigma_AHE is found to be proportional to the square of Hall mobility, suggesting that charge scattering strongly affects the AHE in this system. The anatase Ti1-xCoxO2 also follows a scaling relationship to conductivity sigma_xx as sigma_AHE ~ sigma_xx^1.6, which was observed for another polymorph rutile Ti1-xCoxO2, suggesting an identical mechanism of their AHE.

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