Anomalous Transport Properties in the Iron-Based Kagome Ferromagnet Fe \(_3\) Sn

Motivated by the discovery of the large anomalous transport responses from the Berry curvature in the noncollinear kagome antiferromagnet Mn \(_3\) X (X = Sn, Ge), we investigate the anomalous Hall conductivity \(\sigma _{ij}\) and anomalous thermoelectric conductivity \(\alpha _{ij}\) of the iron-base kagome ferromagnet Fe \(_3\) Sn with the Curie temperature of 760 K. The maximum value of the transverse thermoelectric conductivity \(|\alpha _{ji}|_\textrm{max}\sim 2.5\) AK \(^{-1}\) m \(^{-1}\) at 200 K is observed by using a polycrystalline sample of Fe \(_3\) Sn, which is comparable to the recently reported \(\alpha _{ij}\) in other topological magnets. The magnetocrystalline anisotropy energy (MAE) and the magnetization direction dependence of the anomalous transport properties are also evaluated by the present theoretical calculations. We find the strong anisotropy in the chemical potential dependence of \(\sigma _{ij}\) and \(\alpha _{ij}\) , and we conclude that the in-plane components produces the main component of \(\alpha _{ij}\) in the polycrystalline sample.