弯曲YBa2Cu3O7-d晶界中涡旋沟道的抑制
Suppression of vortex channeling in meandered YBa2Cu3O7-d grain boundaries
摘要：
本文研究了YBa_2Cu_3O_（7-d）（YBCO）涂层导体中弯曲和平面单晶界的临界电流密度（Jc）与面内磁场（H）的关系。平面GB的Jc（H）特性与先前在SrTiO 3双晶上生长的YBCO薄膜的单个GB中观察到的一致。在直边界的特征通量沟道制度时，H是面向GB平面附近，与减少Jc，被认为是。曲折的GB没有显示出涡流沟道，因为不可能有足够长度的涡线位于其中。
英文摘要：
We report on the in-plane magnetic field (H) dependence of the critical current density (Jc) in meandered and planar single grain boundaries (GBs) isolated in YBa2Cu3O7-d (YBCO) coated conductors. The Jc(H)properties of the planar GB are consistent with those previously seen in single GBs of YBCO films grown on SrTiO3 bi-crystals. In the straight boundary a characteristic flux channeling regime when H is oriented near the GB plane, associated with a reduced Jc, is seen. The meandered GB does not show vortex channeling since it is not possible for a sufficient length of vortex line to lie within it.
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