| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Long-Time Magnetic Relaxation in Antiferromagnetic Topological Material EuCd$_2$As$_2$ |
| Yang Wang1,2†, Cong Li1,2†, Yong Li1,2†, Xuebo Zhou1,2, Wei Wu1,2, Runze Yu1,2, Jianfa Zhao1,2, Chaohui Yin1,2, Youguo Shi1,2,3, Changqing Jin1,2,3, Jianlin Luo1,2,3, Lin Zhao1,2,3, Tao Xiang1,2,4, Guodong Liu1,2,3*, and X. J. Zhou1,2,3,4* |
1Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2University of Chinese Academy of Sciences, Beijing 100049, China
3Songshan Lake Materials Laboratory, Dongguan 523808, China
4Beijing Academy of Quantum Information Sciences, Beijing 100193, China
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| Cite this article: |
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Yang Wang, Cong Li, Yong Li et al 2021 Chin. Phys. Lett. 38 077201 |
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Abstract Magnetic topological materials have attracted much attention due to the correlation between topology and magnetism. Recent studies suggest that EuCd$_2$As$_2$ is an antiferromagnetic topological material. Here by carrying out thorough magnetic, electrical and thermodynamic property measurements, we discover a long-time relaxation of the magnetic susceptibility in EuCd$_2$As$_2$. The (001) in-plane magnetic susceptibility at 5 K is found to continuously increase up to $\sim$10% over the time of $\sim$14 hours. The magnetic relaxation is anisotropic and strongly depends on the temperature and the applied magnetic field. These results will stimulate further theoretical and experimental studies to understand the origin of the relaxation process and its effect on the electronic structure and physical properties of the magnetic topological materials.
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Received: 29 April 2021
Published: 18 June 2021
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| Fund: Supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600 and 2018YFA0305600), the National Natural Science Foundation of China (Grant No. 11974404), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB33000000), and the Youth Innovation Promotion Association of CAS (Grant No. 2017013). |
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