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arXiv · 1601.04903

Robust superconductivity and transport properties in (Li1-xFex)OHFeSe single crystals

Hai Lin·Jie Xing·Xiyu Zhu·Huan Yang·Hai-Hu Wen
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Abstract

The recently discovered (Li${_{1-x}}$Fe${_x}$)OHFeSe superconductor with $T_c$ about 40K provides a good platform for investigating the magnetization and electrical transport properties of FeSe-based superconductors. By using a hydrothermal ion-exchange method, we have successfully grown crystals of (Li${_{1-x}}$Fe${_x}$)OHFeSe. X-ray diffraction on the sample shows the single crystalline PbO-type structure with the c-axis preferential orientation. Magnetic susceptibility and resistive measurements show an onset superconducting transition at around ${T_c}$=38.3K. Using the magnetization hysteresis loops and Bean critical state model, a large critical current ${J_s}$ is observed in low temperature region. The critical current density is suppressed exponentially with increasing magnetic field. Temperature dependencies of resistivity under various currents and fields are measured, revealing a robust superconducting current density and bulk superconductivity.

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Hai Lin, Jie Xing, Xiyu Zhu, Huan Yang, Hai-Hu Wen. 2016-01-19. Robust superconductivity and transport properties in (Li1-xFex)OHFeSe single crystals. https://doi.org/10.1007/s11433-016-5782-z

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