Anomalous Hall effect in kagome ferromagnet MgMn₆Sn₆ single crystal

Kagome magnets are of growing interest due to their topological electronic structures and unconventional magnetic behavior. Here, we report on the anomalous Hall effect (AHE) in the kagome ferromagnet MgMn₆Sn₆, which has a Curie temperature of ∼ 290 K and an in-plane easy magnetization axis. Magnetotransport measurements show a positive magnetoresistance (MR) below 50 K, which becomes negative at higher temperatures. An intrinsic anomalous Hall conductivity of 114 S⋅cm⁻¹ is observed in MgMn₆Sn₆ single crystals, consistent with ab initio calculations. Moreover, theoretical predictions indicate that shifting the Fermi level (E_F) upward by ∼ 70 meV could enhance the AHE to ∼ 528 S⋅cm⁻¹. These results position MgMn₆Sn₆ as a promising and tunable platform for exploring topological magnetism and related electronic phenomena.