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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 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 |
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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.
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Received: 27 April 2025
Revised: 11 July 2025
Accepted manuscript online: 28 July 2025
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PACS:
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73.43.Qt
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(Magnetoresistance)
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75.50.Cc
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(Other ferromagnetic metals and alloys)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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| Fund: 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). |
Cite this article:
Zhonghua Ma(马中华), Jie Du(杜杰), Jianhua Wang(王建华), Feng Zhou(周凤), Jie Chen(陈杰), Tao Zhu(朱涛), Hang Li(李航), and Wenhong Wang(王文洪) Anomalous Hall effect in kagome ferromagnet MgMn6Sn6 single crystal 2026 Chin. Phys. B 35 027302
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