Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet Fe${}_3$Sn

Abstract

The material class of kagome metals has rapidly grown and has been established as a field to explore the interplay between electronic topology and magnetism. In this work, we report a combined theoretical and experimental study of the anomalous Hall effect of the ferromagnetic kagome metal Fe${}_3$Sn. The compound orders magnetically at 725 K and presents an easy-plane anisotropy. Hall measurements in single crystals below room temperature yield an anomalous Hall conductivity ${\sigma }_{xy}\sim 500(\Omega \text{cm}{)}^{-1}$, which is found to depend weakly on temperature. This value is in good agreement with the band-intrinsic contribution obtained by density-functional calculations. Our calculations also yield the correct magnetic anisotropy energy and predict the existence of Weyl nodes near the Fermi energy.

9 pages and 9 figures including supplement

References in corpus (2)

• Quantum transport theory of anomalous electric, thermoelectric, and thermal Hall effects in ferromagnets
• Topological Kagome magnet Co3Sn2S2 thin flakes with high electron mobility and large anomalous Hall effect