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arXiv · 2009.11006

Enhancement of anomalous Nernst effect in Ni/Pt superlattice

T. Seki·Y. Sakuraba·K. Masuda·A. Miura·M. Tsujikawa·K. Uchida·T. Kubota·Y. Miura·M. Shirai·K. Takanashi
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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 (${\it t}$). The anomalous Nernst coefficient was increased up to more than 1 ${\mu}$V K$^{-1}$ for 2.0 nm ${\leq}$ ${\it t}$ ${\leq}$ 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 ${\it t}$ = 4.0 nm, plays a prime role for the enhanced ANE of the Ni/Pt (001) superlattices.

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T. Seki, Y. Sakuraba, K. Masuda, A. Miura, M. Tsujikawa, K. Uchida, T. Kubota, Y. Miura, M. Shirai, K. Takanashi. 2020-09-23. Enhancement of anomalous Nernst effect in Ni/Pt superlattice. https://doi.org/10.1103/physrevb.103.l020402

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