Superconducting Joining of YBCO Coated Conductors without a Large Critical Current Loss
Superconducting Joining of YBCO Coated Conductors without a Large Critical Current Loss
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DOI：
10.1016/j.mtphys.2021.100567
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发表时间：
2021-10
影响因子：
11.5
通讯作者：
Daxing Huang;H. Shang;Taiguang Li;B. Xie;Q. Zou;H. Gu;Z. Ren;F. Ding
中科院分区：
文献类型：
--
作者：
Daxing Huang;H. Shang;Taiguang Li;B. Xie;Q. Zou;H. Gu;Z. Ren;F. Ding
实现具有大电流容量的超导连接是YBa 2Cu 3 O 7-δ（YBCO）涂层导体（CC）磁共振成像应用的一个挑战。在这里，我们报告了一种新的方法来制造超导连接之间的两个YBCO CC使用连接带组成的YBCO，银，缓冲，和衬底。从YBCO CC的缓冲叠层上剥离的YBCO层可以保持其原始临界电流（Ic）的90%以上。这特别是由于Ag层充当快速氧扩散路径以促进氧化退火期间YBCO层的超导性的恢复。在接合的YBCO界面处的原子排列沿（001）面沿着，使得能够实现上级超导性能。该方法为实现第二代高温超导磁体的持续电流模式运行提供了一种可行的解决方案。
Achieving superconducting joinings with large current capacities is a challenge for magnetic resonance imaging applications of YBa2Cu3O7-δ(YBCO) coated conductors (CCs). Here we report a novel method to fabricate a superconducting joining between two YBCO CCs using a joining strap consisting of YBCO, Ag, a buffer, and a substrate. The YBCO layer exfoliated from the buffer stack of a YBCO CC can retain more than 90% of its original critical current (Ic). This is particularly due to the Ag layer serving as a fast oxygen diffusion path to promote the recovery of superconductivity of the YBCO layer during oxygenation annealing. The atomic arrangement at the joined YBCO interface is well aligned along the (001) plane, enabling superior superconducting performance. The method reported here provides a practicable solution to achieve persistent current mode operation in second-generation high-temperature superconducting magnet applications.