Large anomalous Nernst effect in the ferromagnetic Fe3Si polycrystal

Yangming Wang; Susumu Minami; Akito Sakai; Taishi Chen; Zili Feng; Daisuke Nishio-Hamane; Satoru Nakatsuji

doi:10.1007/978-981-96-0191-2_2

paper

Large anomalous Nernst effect in the ferromagnetic Fe3Si polycrystal

arXiv:2405.01800 · doi:10.1007/978-981-96-0191-2_2

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 $S_{y x} \sim$ 2 $I^¼$ V/K and the transverse thermoelectric coefficient $- I^\pm_{y x}$ $\sim$ 3 Am $^{- 1}$ K $^{- 1}$ for Fe $_{3}$ Si polycrystal at room temperature. The large $- I^\pm_{y x}$ 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