中国物理B ›› 2026, Vol. 35 ›› Issue (2): 27302-027302.doi: 10.1088/1674-1056/adf4a4

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Anomalous Hall effect in kagome ferromagnet MgMn6Sn6 single crystal

Zhonghua Ma(马中华)1, Jie Du(杜杰)2, Jianhua Wang(王建华)2, Feng Zhou(周凤)1, Jie Chen(陈杰)1, Tao Zhu(朱涛)1, Hang Li(李航)1,†, and Wenhong Wang(王文洪)1   

  1. 1 Institute of Quantum Materials and Devices, School of Electronics and Information Engineering, Tiangong University, Tianjin 300387, China;
    2 School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
  • 收稿日期:2025-04-27 修回日期:2025-07-11 接受日期:2025-07-28 发布日期:2026-02-05
  • 通讯作者: Hang Li E-mail:hangli@tiangong.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12204347), National Key Research and Development Program of China (Grant No. 2022YFA1402600), and the Fund from Beijing National Laboratory for Condensed Matter Physics (Grant No. 2023BNLCMPKF011).

Anomalous Hall effect in kagome ferromagnet MgMn6Sn6 single crystal

Zhonghua Ma(马中华)1, Jie Du(杜杰)2, Jianhua Wang(王建华)2, Feng Zhou(周凤)1, Jie Chen(陈杰)1, Tao Zhu(朱涛)1, Hang Li(李航)1,†, and Wenhong Wang(王文洪)1   

  1. 1 Institute of Quantum Materials and Devices, School of Electronics and Information Engineering, Tiangong University, Tianjin 300387, China;
    2 School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
  • Received:2025-04-27 Revised:2025-07-11 Accepted:2025-07-28 Published:2026-02-05
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12204347), National Key Research and Development Program of China (Grant No. 2022YFA1402600), and the Fund from Beijing National Laboratory for Condensed Matter Physics (Grant No. 2023BNLCMPKF011).

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摘要： 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$\cdot$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 ($E_{\rm F}$) upward by ~70 meV could enhance the AHE to ~528 S$\cdot$cm$^{-1}$. These results position MgMn$_{6}$Sn$_{6}$ as a promising and tunable platform for exploring topological magnetism and related electronic phenomena.

关键词: magnetoresistance, kagome ferromagnet, anomalous Hall effect

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$\cdot$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 ($E_{\rm F}$) upward by ~70 meV could enhance the AHE to ~528 S$\cdot$cm$^{-1}$. These results position MgMn$_{6}$Sn$_{6}$ as a promising and tunable platform for exploring topological magnetism and related electronic phenomena.

Key words: magnetoresistance, kagome ferromagnet, anomalous Hall effect

中图分类号:  (Magnetoresistance)

  • 73.43.Qt
75.50.Cc (Other ferromagnetic metals and alloys) 75.47.-m (Magnetotransport phenomena; materials for magnetotransport)