层状CrTe铁磁体中可能存在高于室温的拓扑霍尔效应。
Possible Topological Hall Effect above Room Temperature in Layered CrTe Ferromagnet.
作者信息
Huang Meng, Gao Lei, Zhang Ying, Lei Xunyong, Hu Guojing, Xiang Junxiang, Zeng Hualing, Fu Xuewen, Zhang Zengming, Chai Guozhi, Peng Yong, Lu Yalin, Du Haifeng, Chen Gong, Zang Jiadong, Xiang Bin
机构信息
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Lab of Materials for Energy Conversion, University of Science and Technology of China, Hefei, Anhui 230026, China.
Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, P.R. China.
出版信息
Nano Lett. 2021 May 26;21(10):4280-4286. doi: 10.1021/acs.nanolett.1c00493. Epub 2021 May 12.
Topological Hall effect (THE) has been used as a powerful tool to unlock spin chirality in novel magnetic materials. Recent focus has been widely paid to THE and possible chiral spin textures in two-dimensional (2D) layered magnetic materials. However, the room-temperature THE has been barely reported in 2D materials, which hinders its practical applications in 2D spintronics. In this paper, we report a possible THE signal featuring antisymmetric peaks in a wide temperature window up to 320 K in CrTe, a new quasi-2D ferromagnetic material. The temperature, thickness, and magnetic field dependences of the THE lead to potential spin chirality origin that is associated with the spin canting under external magnetic fields. Our work holds promise for practical applications in future chiral spin-based vdW spintronic devices.
拓扑霍尔效应（THE）已被用作揭示新型磁性材料中自旋手性的有力工具。近来，二维（2D）层状磁性材料中的拓扑霍尔效应及可能的手性自旋纹理受到了广泛关注。然而，二维材料中室温拓扑霍尔效应鲜有报道，这阻碍了其在二维自旋电子学中的实际应用。在本文中，我们报道了一种可能的拓扑霍尔效应信号，在新型准二维铁磁材料CrTe中，该信号在高达320 K的宽温度窗口内呈现反对称峰。拓扑霍尔效应的温度、厚度和磁场依赖性导致了潜在的自旋手性起源，这与外部磁场下的自旋倾斜有关。我们的工作有望在未来基于手性自旋的范德华自旋电子器件中得到实际应用。
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