Evolution of superconductivity by oxygen annealing in FeTe0.8S0.2

Yoshikazu Mizuguchi; Keita Deguchi; Shunsuke Tsuda; Takahide Yamaguchi; Yoshihiko Takano

doi:10.1209/0295-5075/90/57002

Evolution of superconductivity by oxygen annealing in FeTe0.8S0.2

Superconductivity 2010-07-01 v2

Authors: Yoshikazu Mizuguchi , Keita Deguchi , Shunsuke Tsuda , Takahide Yamaguchi , Yoshihiko Takano

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Abstract

Oxygen annealing dramatically improved the superconducting properties of solid-state-reacted FeTe0.8S0.2, which showed only a broad onset of superconducting transition just after the synthesis. The zero resistivity appeared and reached 8.5 K by the oxygen annealing at 200\degree C. The superconducting volume fraction was also enhanced from 0 to almost 100%. The lattice constants were compressed by the oxygen annealing, indicating that the evolution of bulk superconductivity in FeTe0.8S0.2 was correlated to the shrinkage of lattice.

Keywords

oxygen annealing superconductivity FeTe0.8S0.2 zero resistivity superconducting volume fraction lattice constants bulk superconductivity

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@article{arxiv.1003.2059,
  title  = {Evolution of superconductivity by oxygen annealing in FeTe0.8S0.2},
  author = {Yoshikazu Mizuguchi and Keita Deguchi and Shunsuke Tsuda and Takahide Yamaguchi and Yoshihiko Takano},
  journal= {arXiv preprint arXiv:1003.2059},
  year   = {2010}
}

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13 pages, 6 figures

Evolution of superconductivity by oxygen annealing in FeTe0.8S0.2

Abstract

Keywords

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