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

被引：56
|
作者：
Mizuguchi, Y. [1 ,2 ,3 ]
Deguchi, K. [1 ,2 ,3 ]
Tsuda, S. [1 ,2 ]
Yamaguchi, T. [1 ,2 ]
Takano, Y. [1 ,2 ,3 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] JST, TRIP, Tsukuba, Ibaraki 3050047, Japan
[3] Univ Tsukuba, Tsukuba, Ibaraki 3050001, Japan
来源：
EPL | 2010年 / 90卷 / 05期
关键词：
D O I：
10.1209/0295-5075/90/57002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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 the transition temperature T-c(zero) reached 8.5 K by the oxygen annealing at 200 degrees C. The shielding 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 the lattice. Copyright (C) EPLA, 2010
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页数：6
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