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

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

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 superconducti...

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Veröffentlicht in:arXiv.org 2010-03
Hauptverfasser: Mizuguchi, Yoshikazu, Deguchi, Keita, Tsuda, Shunsuke, Yamaguchi, Takahide, Takano, Yoshihiko
Format: Artikel
Sprache:eng
Schlagworte:
Annealing
Evolution
Lattice parameters
Oxygen
Physics - Superconductivity
Shrinkage
Superconductivity
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Zusammenfassung: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1003.2059