Large anomalous Nernst effect in the ferromagnetic Fe3Si polycrystal

Abstract

The high-throughput calculation predicts that the Fe-based cubic ferromagnet Fe${}_3$Si may exhibit a large anomalous Nernst effect (ANE). Here, we report our experimental observation of the large Nernst coefficient $S_{yx}\sim$2 $\mu$V/K and the transverse thermoelectric coefficient $-{\alpha }_{yx}$ $\sim$ 3 Am${}^{-1}$K${}^{-1}$ for Fe${}_3$Si polycrystal at room temperature. The large $-{\alpha }_{yx}$ indicates that the large ANE originates from the intrinsic Berry curvature mechanism. The high Curie temperature of 840 K and the most abundant raw elements of Fe and Si make Fe${}_3$Si a competitive candidate for Nernst thermoelectric generations.

Accepted to Proceedings of the 15th Asia Pacific Physics Conference (APPC 15), Springer Nature

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