Enhancement of anomalous Nernst effect in Ni/Pt superlattice

Abstract

We report an enhancement of the anomalous Nernst effect (ANE) in Ni/Pt (001) epitaxial superlattices. The transport and magneto-thermoelectric properties were investigated for the Ni/Pt superlattices with various Ni layer thicknesses ($t$). The anomalous Nernst coefficient was increased up to more than 1 $\mu$V K${}^{-1}$ for 2.0 nm $\le$ $t$ $\le$ 4.0 nm, which was the remarkable enhancement compared to the bulk Ni. It has been found that the large transverse Peltier coefficient ($\alpha$${}_{xy}$), reaching $\alpha$${}_{xy}$ = 4.8 A K${}^{-1}$ m${}^{-1}$ for $t$ = 4.0 nm, plays a prime role for the enhanced ANE of the Ni/Pt (001) superlattices.

22 pages, 4 figures

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• Highly Tunable Perpendicular Magnetic Anisotropy and Anisotropic Magnetoresistance in Ru-doped La0.67Sr0.33MnO3 Epitaxial Films
• Anomalous Nernst effect in Co thin films under laser irradiation