| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Anisotropic superconducting properties of FeSe0.5Te0.5 single crystals |
| Jia-Ming Zhao(赵佳铭)1 and Zhi-He Wang(王智河)2,† |
1 School of Physics, Nanjing University, Nanjing 210093, China;
2 Center for Superconducting Physics and Materials, Collaborative Innovation Center of Advanced Microstructures and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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Abstract We investigated the anisotropic electrical transport and magnetic properties of FeSe$_{0.5}$Te$_{0.5}$ single crystals grown by the self-flux method. The in-plane resistivity shows a metallic-like temperature dependence, while the out-of-plane resistivity shows a broad hump with a maximum at around 64 K. The magnetization loops for $H/\!/c$-axis and $H/\!/ab$-plane are also different, for example, there is a typical second peak for $H/\!/c$-axis. The in-plane critical current density is larger than the out-of-plane one. The coherence length and penetration depth were estimated by the Ginzburg-Landau theory. The anisotropic parameter $\gamma $ depends on the applied magnetic field and the temperature. The coupling of superconducting FeSe(Te) layers and the flux pinning mechanism relevant to anisotropy are also discussed.
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Received: 30 November 2021
Revised: 21 January 2022
Accepted manuscript online: 17 February 2022
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PACS:
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74.25.-q
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(Properties of superconductors)
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74.25.F-
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(Transport properties)
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74.25.Sv
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(Critical currents)
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74.25.Wx
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(Vortex pinning (includes mechanisms and flux creep))
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0300401) and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB25000000). |
Corresponding Authors:
Zhi-He Wang
E-mail: zhwang@nju.edu.cn
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Cite this article:
Jia-Ming Zhao(赵佳铭) and Zhi-He Wang(王智河) Anisotropic superconducting properties of FeSe0.5Te0.5 single crystals 2022 Chin. Phys. B 31 097402
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