Structural and resistivity properties of Fe$_{1-x}$Co${_x}$Se single crystals grown by the molten salt method

Qiaoyu Wang; Mingwei Ma; Binbin Ruan; Menghu Zhou; Yadong Gu; Qingsong Yang; Lewei Chen; Yunqing Shi; Junkun Yi; Genfu Chen; Zhian Ren

arXiv · 2402.14436

Structural and resistivity properties of Fe$_{1-x}$Co${_x}$Se single crystals grown by the molten salt method

Qiaoyu Wang·Mingwei Ma·Binbin Ruan·Menghu Zhou·Yadong Gu·Qingsong Yang·Lewei Chen·Yunqing Shi·Junkun Yi·Genfu Chen·Zhian Ren

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Abstract

A series of tetragonal Fe$_{1-x}$Co${_x}$Se single crystals with a complete Co doping range (0$\leq$x$\leq$0.52) up to its solid solubility limit in FeSe have been grown by an eutectic AlCl${_3}$/KCl molten salt method. The typical lateral size of as-grown Fe$_{1-x}$Co${_x}$Se single crystals is 1$-$5 mm. The chemical composition and homogeneity of the crystals was examined by both inductively coupled plasma atomic emission spectroscopy and energy dispersive spectrometer. X-ray diffraction analysis demonstrates that the crystal lattice parameters $a$ and $c$ are both linearly decreased with increasing Co doping level x. In the whole doping range, all the samples show metallic behaviour in contrast to a metal insulator transition of Cu-doped FeSe according to the resistivity measurements

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Qiaoyu Wang, Mingwei Ma, Binbin Ruan, Menghu Zhou, Yadong Gu, Qingsong Yang, Lewei Chen, Yunqing Shi, Junkun Yi, Genfu Chen, Zhian Ren. 2024-02-22. Structural and resistivity properties of Fe$_{1-x}$Co${_x}$Se single crystals grown by the molten salt method. https://arxiv.org/abs/2402.14436

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