Improvement in structure and superconductivity of bulk FeSe0.5Te0.5 superconductors by optimizing sintering temperature
Improvement in structure and superconductivity of bulk FeSe0.5Te0.5 superconductors by optimizing sintering temperature
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通过优化烧结温度改善块体FeSe0.5Te0.5超导体的结构和超导性能
DOI:
10.1016/j.scriptamat.2015.09.039
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发表时间:
2016-02
影响因子:
6
通讯作者:
Huijun Li
中科院分区:
文献类型:
--
作者:
Yongchang Liu;Zongqing Ma;Liming Yu;Huijun Li
Sintering temperature plays a vital role in the evolution of phase structure and microstructure in polycrystalline FeSe0.5Te0.5bulks fabricated by the two-step sintering method, and thus significantly influences their superconducting properties. Elevated sintering temperature (600–700 °C) at second step facilitates the substitution of Te into the superconducting phase, which leads to the increased lattice distortion and thus contributes to the enhancement of superconductivity (the value ofTcreaches 15.6 K). At the same time, the accelerated growth of the superconducting grains and the improved homogeneity motivated by elevated sintering temperature serve as the main reason for the sharp superconducting transition.
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影响因子:
9.2
作者:
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通讯作者:
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影响因子:
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影响因子:
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16.6
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通讯作者:
D. Yu;P. Prikhodchenko;C. Mason;Sudip Kumar Batabyal;J. Gun;S. Sladkevich;A. Medvedev;O. Lev