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Enhancement of Superconductivity in FeSe0.5Te0.5 by Furnace Cooling

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Abstract

It has been revealed that the superconductivity of the polycrystalline FeSe0.5Te0.5 synthesized by using the melting technique depends on the way of cooling. To systematically study the effects of furnace cooling on the superconductivity, we prepared the polycrystalline FeSe0.5Te0.5 by the melting technique with the furnace cooling. Furthermore, quenching at different temperatures was also carried out for comparison. According to our results of magnetization measurements, the furnace cooling contributes to an enhancement of the superconductivity; however, the quenched samples only held degraded superconductivity. Moreover, the superconductivity of the quenched samples could also be enhanced when additional heat treatments with the furnace cooling were employed. Our results indicate that the melting technique with the furnace cooling and the resulting high-quality polycrystalline FeSe0.5Te0.5 are promising in applications.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. NSFC-U1432135) and the Scientific Research Foundation of Graduate School (Grant No. YBJJ1523) of Southeast University.

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Authors and Affiliations

  1. Key Laboratory of MEMS of the Ministry of Education, Department of Physics, Southeast University, Nanjing, 211189, People’s Republic of China

    X. Li, Y. F. Zhang, W. Zhou, F. F. Yuan, N. Li & Z. X. Shi

  2. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio, 43210, USA

    X. Li

  3. Department of Physics, Southeast University, Nanjing, 211189, China

    Z. X. Shi

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  1. X. Li
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  2. Y. F. Zhang
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  3. W. Zhou
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  4. F. F. Yuan
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  5. N. Li
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Correspondence to Z. X. Shi.

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Li, X., Zhang, Y.F., Zhou, W. et al. Enhancement of Superconductivity in FeSe0.5Te0.5 by Furnace Cooling. J Supercond Nov Magn 29, 1193–1196 (2016). https://doi.org/10.1007/s10948-016-3405-6

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  • DOI: https://doi.org/10.1007/s10948-016-3405-6

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