Oxygen electromigration applied to a YBa₂Cu₃O nanowire can be used to tune its electrical properties. Here, we apply electromigration to YBCO nanowire-based superconducting quantum interference devices (SQUIDs) and study its effect on the voltage modulation depth of the devices. Using a dc electromigration current we replenish the oxygen of the weak links, improving the critical current symmetry of the SQUIDs. AC current electromigration is used to reduce the doping level of the weak links, thus reducing their critical current and increasing differential resistance. Both type of electromigration processes are found to improve the SQUIDs performance, although the best results are obtained with ac biased electromigration, which improved the voltage modulations of the SQUIDs by a factor as high as 8. This procedure can be instrumental to fine tune ex-situ the properties of superconducting electronics where a large number of weak links are required.

应用于 YBa ₂ Cu ₃ O 的氧电迁移纳米线可用于调整其电气特性。在这里，我们将电迁移应用于基于 YBCO 纳米线的超导量子干涉器件 (SQUID)，并研究其对器件电压调制深度的影响。我们使用直流电迁移电流补充薄弱环节的氧气，改善 SQUID 的临界电流对称性。AC电流电迁移用于降低薄弱环节的掺杂水平，从而降低其临界电流并增加差分电阻。两种类型的电迁移过程都被发现可以提高 SQUID 的性能，尽管使用交流偏置电迁移获得了最好的结果，它将 SQUID 的电压调制提高了 8 倍。