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首页> 外文期刊>Nanotechnology >Hot spot formation in focused-ion-beam-fabricated YBa2Cu3O7-x nanobridges with high critical current densities
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Hot spot formation in focused-ion-beam-fabricated YBa2Cu3O7-x nanobridges with high critical current densities

机译：具有高临界电流密度的聚焦离子束制造的YBA2CU3O7-X纳米螺旋的热点形成

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摘要

We report on the fabrication and evaluation of nanoscale YBa2Cu3O7-x (YBCO) constrictions using focused-ion-beam techniques for potential application as YBCO bolometers. A gold protective layer was found to be critical for supressing contamination from gallium ions in order to obtain high critical current densities. Further processing using a radio-frequency plasma to remove the gold protective layer has also been studied and was found to be effective in minimizing sample damage resulting from overheating. Current-voltage measurement indicate that the nanobridges go through the transition from superconducting to normal state with different dissipation mechanism including flux creep and hot spot formation.
机译：我们使用聚焦离子光束技术报告纳米级YBA2Cu3O7-X（YBCO）收缩的制造和评估，用于潜在应用作为YBCO钻孔计。 发现金保护层对抑制来自镓离子的污染至关重要，以获得高临界电流密度。 还研究了使用射频等离子体去除金保护层的进一步处理，并发现在最小化过热引起的样品损伤方面有效。 电流电压测量表明纳米纤维经过过渡到具有不同耗散机制的超导到正常状态，包括磁通蠕变和热点形成。

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