# Interfacial scattering effect on anomalous Hall effect in Ni/Au multilayers

Qiang Zhang, Peng Li, Yan Wen, Xin He, Yuelei Zhao, Junli Zhang, Xixiang Zhang

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## Abstract

The effect of interfacial scattering on anomalous Hall effect (AHE) was studied in the ${{\left(\text{N}{{\text{i}}_{\frac{36}{n}~\text{nm}}}/\text{A}{{\text{u}}_{\frac{12}{n}~\text{nm}}}\right)}_{n}}$ multilayers. Field-dependent Hall resistivity was measured in the temperature range of 5K with the magnetic field up to 50 kOe. The anomalous Hall resistivity (${{\rho}_{\text{AHE}}}$ ) was enhanced by more than six times at 5 K from n €‰ €‰= €‰ €‰1 to n €‰ €‰= €‰ €‰12 due to the increased interfacial scattering, whereas the longitudinal resistivity (${{\rho}_{xx}}$ ) was increased nearly three times. A scaling relation ${{\rho}_{\text{AHE}}}\sim \rho _{xx}^{\gamma}$ with $\gamma =1.85$ was obtained for ${{\rho}_{\text{AHE}}}$ and ${{\rho}_{xx}}$ measured at 5 €‰K, indicating that the dominant mechanism(s) of the AHE in these multilayers should be side-jump or/and intrinsic in nature. The new scaling relation ${{\rho}_{\text{AHE}}}=\alpha {{\rho}_{xx0}}+\beta \rho _{xx0}^{2}+b\rho _{xx}^{2}$ (Tian et al 2009 Phys. Rev. Lett. 103 087206) has been applied to our data to identify the origin of the AHE in this type of multilayer.
Original language English (US) 235002 Journal of Physics D: Applied Physics 50 23 https://doi.org/10.1088/1361-6463/aa6e84 Published - May 16 2017

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