Universal scaling of the anomalous Hall effect. / Liu, Wenqing.

In: Journal of Physics D: Applied Physics, Vol. 50, No. 15, 13.03.2017, p. 1-5.

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### Abstract

We have undertaken a detailed study of the magneto-transport properties of ultra-thin Fe films epitaxially grown on GaAs (1 0 0). A metal–semiconductor transition has been observed with a critical thickness of 1.25 nm, which was thought to be related to the thermally activated tunneling between metallic clusters. By fitting ${{\rho}_{\text{AH}}}$ versus $\rho _{xx}^{2}$ with the TYJ equation (Tian et al 2009 Phys. Rev. Lett. 103 087206), we found that the magnetization is negligible for the scaling of the anomalous Hall effect in ultra-thin Fe films. Furthermore, the intrinsic term, which is acquired by the linear fitting of ${{\rho}_{\text{AH}}}$ versus $\rho _{xx}^{2}$ , shows an obvious decrease when the film thickness drops below 1.25 nm, which was thought to be related to the fading of the Berry curvature in the ultra-thin film limit.
Original language English 1-5 5 Journal of Physics D: Applied Physics 50 15 20 Jan 2017 https://doi.org/10.1088/1361-6463/aa5b1c Published - 13 Mar 2017
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