Large Anomalous Nernst Effect in the Ferromagnetic Fe \(_3\) Si Polycrystal

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 \(\upmu \) 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.