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Improvement in structure and superconductivity of bulk FeSe0.5Te0.5 superconductors by optimizing sintering temperature

Journal Article


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Abstract


  • Sintering temperature plays a vital role in the evolution of phase structure and microstructure in polycrystalline FeSe0.5Te0.5 bulks 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 of Tc reaches 15.6K). 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.

Authors


  •   Ma, Zongqing (external author)
  •   Chen, Ning (external author)
  •   Yu, Liming (external author)
  •   Li, Huijun (external author)
  •   Liu, Yongchang (external author)

Publication Date


  • 2016

Citation


  • Chen, N., Liu, Y., Ma, Z., Yu, L. & Li, H. (2016). Improvement in structure and superconductivity of bulk FeSe0.5Te0.5 superconductors by optimizing sintering temperature. Scripta Materialia, 112 152-155.

Scopus Eid


  • 2-s2.0-84951869526

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2651&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1649

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 152

End Page


  • 155

Volume


  • 112

Abstract


  • Sintering temperature plays a vital role in the evolution of phase structure and microstructure in polycrystalline FeSe0.5Te0.5 bulks 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 of Tc reaches 15.6K). 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.

Authors


  •   Ma, Zongqing (external author)
  •   Chen, Ning (external author)
  •   Yu, Liming (external author)
  •   Li, Huijun (external author)
  •   Liu, Yongchang (external author)

Publication Date


  • 2016

Citation


  • Chen, N., Liu, Y., Ma, Z., Yu, L. & Li, H. (2016). Improvement in structure and superconductivity of bulk FeSe0.5Te0.5 superconductors by optimizing sintering temperature. Scripta Materialia, 112 152-155.

Scopus Eid


  • 2-s2.0-84951869526

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2651&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1649

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 152

End Page


  • 155

Volume


  • 112