| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Observation of Giant Topological Hall Effect in Room-Temperature Ferromagnet Cr$_{0.82}$Te |
| Wei-Ting Miao1,2, Wei-Li Zhen1*, Zhen Lu1, Heng-Ning Wang1, Jie Wang1, Qun Niu1*, and Ming-Liang Tian1,2,3* |
1Anhui Key Laboratory of Low-energy Quantum Materials and Devices, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
2Science Island Branch, Graduate School of University of Science and Technology of China, Hefei 230026, China
3School of Physics and Optoelectronic Engineering, Anhui University, Hefei 230601, China
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| Cite this article: |
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Wei-Ting Miao, Wei-Li Zhen, Zhen Lu et al 2024 Chin. Phys. Lett. 41 067501 |
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Abstract Novel magnetic materials with non-trivial magnetic structures have led to exotic magnetic transport properties and significantly promoted the development of spintronics in recent years. Among them is the Cr$_{x}$Te$_{y}$ family, the magnetism of which can persist above room temperature, thus providing an ideal system for potential spintronic applications. Here we report the synthesis of a new compound, Cr$_{0.82}$Te, which demonstrates a record-high topological Hall effect at room temperature in this family. Cr$_{0.82}$Te displays soft ferromagnetism below the Curie temperature of 340 K. The magnetic measurement shows an obvious magneto-crystalline anisotropy with the easy axis located in the $ab$ plane. The anomalous Hall effect can be well explained by a dominating skew scattering mechanism. Intriguing, after removing the normal Hall effect and anomalous Hall effect, a topological Hall effect can be observed up to 300 K and reaches up to 1.14 $µ\Omega\cdot$cm at 10 K, which is superior to most topological magnetic structural materials. This giant topological Hall effect possibly originates from the noncoplanar spin configuration during the spin flop process. Our work extends a new Cr$_{x}$Te$_{y}$ system with topological non-trivial magnetic structure and broad prospects for spintronics applications in the future.
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Received: 13 March 2024
Published: 20 June 2024
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| PACS: |
75.50.Cc
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(Other ferromagnetic metals and alloys)
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75.50.Gg
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(Ferrimagnetics)
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75.30.Gw
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(Magnetic anisotropy)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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