Anomalous Hall effect in kagome ferromagnet MgMn 6 Sn 6 single crystal

作者：Zhonghua Ma, Jie Du, Jianhua Wang, Feng Zhou, Jie Chen, Tao Zhu, Hang Li, Wenhong Wang · 发表于：Chinese Physics B · 年份：2025 · DOI：10.1088/1674-1056/adf4a4 · 被引用次数：3 · 研究领域：Topological Materials and Phenomena、Rare-earth and actinide compounds、Magnetic properties of thin films

Abstract 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 MgMn 6 Sn 6 , 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 MgMn 6 Sn 6 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 MgMn 6 Sn 6 as a promising and tunable platform for exploring topological magnetism and related electronic phenomena.