Anisotropic superconducting properties of FeSe0.5Te0.5 single crystals |
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| Affiliation: | 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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| Keywords: | FeSe1-xTex single crystal anisotropy resistivity magnetization |
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