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arXiv 1003.2059cond-mat.supr-con
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氧退火对FeTe0.8S 0.2超导性的影响

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

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

摘要:

氧退火显着提高了超导性能的固态反应FeTe 0.8S0.2,这表明只有一个广泛的发病后,超导转变的合成。在200 \degree C氧退火时,零电阻率出现并达到8.5 K.超导体积分数也从0提高到几乎100%。氧退火压缩了FeTe_(0.8)S_(0.2)的晶格常数,表明FeTe_(0.8)S_(0.2)体超导电性的演化与晶格收缩有关。

英文摘要:

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.

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