TY - JOUR
T1 - Transport current density at temperatures up to 25 K of Cu/Ag composite sheathed 122-type tapes and wires
AU - Liu, Shifa
AU - Lin, Kaili
AU - Yao, Chao
AU - Zhang, Xianping
AU - Dong, Chiheng
AU - Wang, Dongliang
AU - Awaji, Satoshi
AU - Kumakura, Hiroaki
AU - Ma, Yanwei
N1 - Funding Information:
The authors would like to thank Dr Yuqiang Zhao and Professor Rongjin Huang in Technical Institute of Physics and Chemistry, Chinese Academy of Sciences for kindly help in sealing the ends of round wires by arc welding. This work is supported by the National Natural Science Foundation of China (Grant Nos. 51320105015, 51602307 and 51677179), the Beijing Municipal Science and Technology Commission (Grant No. Z171100002017006), the Bureau of Frontier Sciences and Education, Chinese Academy of Sciences (QYZDJ-SSW-JSC026).
Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/10/2
Y1 - 2017/10/2
N2 - The fabrication of iron-based superconductors with high transport critical current density (J c) and low cost is a crucial determinant of whether they can be used for practical applications. In this paper, Cu/Ag composite sheathed Sr0.6K0.4Fe2As2 (Sr122) tapes and Ba0.6K0.4Fe2As2 (Ba122) round wires were fabricated via an ex situ powder-in-tube method and heat-treated by the hot pressing and hot isostatic pressing process respectively. In order to thoroughly reveal the application potential of Cu/Ag composite sheathed '122' iron pnictide superconductors, transport J c of tapes and wires in high fields at temperatures up to 25 K was measured. High transport J c of 4.4 ×104 A cm-2 at 4.2 K and 3.6 ×103 A cm-2 at 20 K in 10 T was achieved in Cu/Ag composite sheathed Sr122 tapes. Transport J c of Ba122 wires is 9.4 ×103 A cm-2 at 4.2 K and 1.9 ×103 A cm-2 at 20 K in 10 T. These results demonstrate the great potential of Cu/Ag composite sheathed '122' iron pnictide superconducting tapes and wires for high-field applications at intermediate temperatures around 20 K, which can be easily obtained by using cryocoolers.
AB - The fabrication of iron-based superconductors with high transport critical current density (J c) and low cost is a crucial determinant of whether they can be used for practical applications. In this paper, Cu/Ag composite sheathed Sr0.6K0.4Fe2As2 (Sr122) tapes and Ba0.6K0.4Fe2As2 (Ba122) round wires were fabricated via an ex situ powder-in-tube method and heat-treated by the hot pressing and hot isostatic pressing process respectively. In order to thoroughly reveal the application potential of Cu/Ag composite sheathed '122' iron pnictide superconductors, transport J c of tapes and wires in high fields at temperatures up to 25 K was measured. High transport J c of 4.4 ×104 A cm-2 at 4.2 K and 3.6 ×103 A cm-2 at 20 K in 10 T was achieved in Cu/Ag composite sheathed Sr122 tapes. Transport J c of Ba122 wires is 9.4 ×103 A cm-2 at 4.2 K and 1.9 ×103 A cm-2 at 20 K in 10 T. These results demonstrate the great potential of Cu/Ag composite sheathed '122' iron pnictide superconducting tapes and wires for high-field applications at intermediate temperatures around 20 K, which can be easily obtained by using cryocoolers.
KW - 122-type iron pnictides
KW - high-field applications
KW - intermediate temperatures
KW - practical utilization
KW - round wires
KW - tapes
KW - transport J
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U2 - 10.1088/1361-6668/aa87ec
DO - 10.1088/1361-6668/aa87ec
M3 - Article
AN - SCOPUS:85033790137
SN - 0953-2048
VL - 30
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 11
M1 - 115007
ER -