The effect of the Ag addition on FeSe superconducting wire by the ex-situ PIT method

被引:4
|
作者
Farisogullari, Derya [1 ,2 ]
Babij, Michal [2 ,3 ]
Karadag, Faruk [1 ]
Ekicibil, Ahmet [1 ]
Takano, Yoshihiko [2 ,4 ]
机构
[1] Cukurova Univ, Dept Phys, Fac Sci & Letters, Adana, Turkey
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki, Japan
[3] Inst Low Temp & Struct Res PAS, Wroclaw, Poland
[4] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki, Japan
关键词
FABRICATION;
D O I
10.1007/s10854-020-05041-8
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We investigated the effect of an Ag addition to the FeSe0.94 superconducting wire. Production and characterization of the Ag-added FeSe0.94 superconducting wire were produced by the ex-situ PIT technique with an iron tube. The structural analysis (XRD and SEM) of the Ag-added FeSe0.94 wire indicate that it is mainly composed of the tetragonal phase (beta-FeSe) with a minor hexagonal (delta-FeSe) and cubic (alpha-Fe) secondary phases. The Ag spread inhomogeneous in the reacted layer, suggesting that it supports the intergrain connections. Moreover, a small amount of Ag entered into the crystal structure. The resistivity started to decrease at 10.5 K, and the zero-resistivity observed at 7.2 K was 0 T. The J(c) was calculated to be 80.7 A/cm(2) at 4.2 K in self-field. The presence of a non-superconducting binary phase of FeSe may behave as a pinning force promoting a larger critical current density. The upper critical field was estimated to be 66.3 T from linear exploration.
引用
收藏
页码:2887 / 2894
页数:8
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