First performance test of FeSe0.5Te0.5-coated conductor coil under high magnetic fields

• Published in: Superconductor science & technology 2023-04, Vol.36 (4)
• Main Authors: Wei, Shaoqing, Liu, Xiao, Zhang, Zhan, Liu, Fang, Qin, Jinggang, Shi, Yi, Li, Yijie, Liu, Linfei, Shi, ZhiXiang, Ren, Li, Xu, Ying, Duan, Pu, Yang, Zhixing, Ge, Junyi, Qi, Yanpeng, Liu, HuaJun, Song, Yuntao
• Format: Article
• Language: English
• Subjects: coated conductor; critical current; FeSe; high background field; hybrid coil; iron-based superconductor
• ISSN: 0953-2048; 1361-6668
• DOI: 10.1088/1361-6668/acba4d

Iron-based superconductors (IBS) have attracted intense interest from scientists around the world. The first FeSe0.5Te0.5 hybrid coil including one FeSe0.5Te0.5 single pancake coil (SPC) and eight YBCO double pancake coils (DPCs) was successfully fabricated and test in this study. The FeSe0.5Te0.5 tape used in the hybrid coil is encapsulated strengthen tape which is with 0.15 mm thickness and 10.5 mm width to withstand the high stress during the cold test. The FeSe0.5Te0.5 encapsulated tape exhibits good performance at 4.2 K cold test. YBCO DPCs were divided into two groups connected to both sides of the FeSe0.5Te0.5 SPC. The critical current of the FeSe0.5Te0.5 coil was measured under the background field increased from 0 T to 10 T. The transport critical current of the FeSe0.5Te0.5 SPC showed 108.1 A at self-field and 17.4 A at 10 T, which had almost the same performance as the short sample. The results in this study showed that the FeSe0.5Te0.5 coated conductor coil have good performance in high magnetic fields.