TY - JOUR
T1 - Tailoring the critical current properties in Cu-sheathed Sr1-xKxFe2As2 superconducting tapes
AU - Lin, Kaili
AU - Yao, Chao
AU - Zhang, Xianping
AU - Zhang, Qianjun
AU - Huang, He
AU - Li, Chen
AU - Wang, Dongliang
AU - Dong, Chiheng
AU - Ma, Yanwei
AU - Awaji, Satoshi
AU - Watanabe, Kazuo
N1 - Funding Information:
This work is partially supported by the National Natural Science Foundation of China (grant nos 51320105015 and 51402292), the Beijing Municipal Science and Technology Commission (grant no. Z141100004214002) and the Beijing Training Project for the Leading Talents in S and T (grant no. Z151100000315001).
Publisher Copyright:
© 2016 IOP Publishing Ltd.
PY - 2016/7/21
Y1 - 2016/7/21
N2 - Cu is an attractive metal to use as the sheath material for Sr1-xKxFe2As2 superconducting wires. However, unfavorable reactions between the Cu sheath and the superconducting core severely affect the superconducting performance. In this work, Cu-sheathed Sr1-xKxFe2As2 tapes are fabricated at a low temperature of 740 °C using a hot pressing method. A systematic correlation between the sintering holding time, reaction layer, microstructure, and superconducting properties is investigated. It is found that the samples that are hot pressed for 60 min exhibit the highest transport critical current density (J c), i.e. 3.5 × 104 A cm-2 in 10 T and 1.6 × 104 A cm-2 in 26 T at 4.2 K, respectively. Furthermore, the engineering critical current density (J e) value of the samples is over 1.0 × 104 A cm-2 in 10 T at 4.2 K. This is by far the highest J c reported for Cu-sheathed iron-based superconducting tapes.
AB - Cu is an attractive metal to use as the sheath material for Sr1-xKxFe2As2 superconducting wires. However, unfavorable reactions between the Cu sheath and the superconducting core severely affect the superconducting performance. In this work, Cu-sheathed Sr1-xKxFe2As2 tapes are fabricated at a low temperature of 740 °C using a hot pressing method. A systematic correlation between the sintering holding time, reaction layer, microstructure, and superconducting properties is investigated. It is found that the samples that are hot pressed for 60 min exhibit the highest transport critical current density (J c), i.e. 3.5 × 104 A cm-2 in 10 T and 1.6 × 104 A cm-2 in 26 T at 4.2 K, respectively. Furthermore, the engineering critical current density (J e) value of the samples is over 1.0 × 104 A cm-2 in 10 T at 4.2 K. This is by far the highest J c reported for Cu-sheathed iron-based superconducting tapes.
KW - critical current density
KW - Cu sheath
KW - superconducting tapes
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U2 - 10.1088/0953-2048/29/9/095006
DO - 10.1088/0953-2048/29/9/095006
M3 - Article
AN - SCOPUS:84985993373
SN - 0953-2048
VL - 29
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 9
M1 - 095006
ER -