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Effects of Mg-Doping on Tetragonal Phase and Superconductivity in FeTe1−x Se x

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Abstract

As revealed in the x-ray-powder patterns and crystallographic data, the primitive tetragonal structure of Fe1 + x Te is retained in Mg0.1FeTe1−x Se x up to the solubility limit near x = 0.5. The excess Mg in Mg0.1FeTe1−x Se x is found to be able to stabilize the PbO-type crystal structure with space group P4/nmm. The superconductivity in Mg0.1FeTe1−x Se x is very sensitive to composition and clear phase transition from paramagnetic to perfect diamagnetic state was observed only for the samples with x = 0.4–0.5. Magnetization data of T c,onset around 10 K and zero resistivity near 11.5 K appear in the sample with composition Mg0.1FeTe0.5Se0.5.

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Acknowledgments

This work was supported by the National Science Council of the Republic of China under Grant no. NSC 102-2212-M194-006-MY3

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Authors and Affiliations

  1. Department of Physics, National Chung Cheng University, Ming-Hsiung, Chia-Yi, 62199, Taiwan, Republic of China

    W. H. Lee, S. C. Chen & S. C. Liang

  2. Department of Physics, National Chung Hsing University, Taichung, Taiwan, Republic of China

    M. D. Lan

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  1. W. H. Lee
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  2. S. C. Chen
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  3. S. C. Liang
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  4. M. D. Lan
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Correspondence to W. H. Lee.

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Lee, W.H., Chen, S.C., Liang, S.C. et al. Effects of Mg-Doping on Tetragonal Phase and Superconductivity in FeTe1−x Se x . J Supercond Nov Magn 29, 101–105 (2016). https://doi.org/10.1007/s10948-015-3265-5

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  • DOI: https://doi.org/10.1007/s10948-015-3265-5

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