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首页> 外文期刊>Applied Superconductivity, IEEE Transactions on >AC Magnetization Losses in Copper-Stabilized YBCO Coated Conductors Subjected to Repeated Mechanical Stresses
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AC Magnetization Losses in Copper-Stabilized YBCO Coated Conductors Subjected to Repeated Mechanical Stresses

机译：反复施加机械应力的铜稳定YBCO涂层导体的交流磁化损失

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摘要

Influence of repeated mechanical stresses on AC losses (transport current and magnetization losses) in YBCO CCs with copper stabilization layers is experimentally investigated. Repeated uni-axial tensile stress-strain was applied to the CC in the longitudinal direction and AC losses were measured electrically at 77 K. Experimental results show that the influence of the repeated mechanical stress/strain on the transport current and magnetization losses are different. In the paper this difference is explained considering that there are two kinds of critical currents of a sample CC which are overall critical current across whole length of the sample CC and local critical current within the sample. These two kinds of critical currents are necessary to take into consideration to understand the AC loss behavior of CCs subjected to repeated mechanical stresses. Local defects in superconducting layers which are developed and grown by repeated mechanical stresses affect the overall and local critical currents differently. Therefore, those defects influence transport current and magnetization losses differently.
机译：实验研究了重复的机械应力对带有铜稳定层的YBCO CC中AC损耗（传输电流和磁化损耗）的影响。在CC的纵向上施加重复的单轴拉伸应力-应变，并在77 K上电测量AC损耗。实验结果表明，重复的机械应力/应变对传输电流和磁化损耗的影响是不同的。在本文中，考虑样品CC的两种临界电流来解释这种差异，它们是样品CC整个长度上的总临界电流和样品内的局部临界电流。考虑到理解承受重复机械应力的CC的AC损耗行为，必须考虑这两种临界电流。由反复的机械应力产生和生长的超导层中的局部缺陷对总和局部临界电流的影响不同。因此，这些缺陷对传输电流和磁化损耗的影响不同。

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