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
Abstract We investigated the anisotropic electrical transport and magnetic properties of FeSeTe 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 -axis and -plane are also different, for example, there is a typical second peak for -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 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.
(Vortex pinning (includes mechanisms and flux creep))
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
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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