Dynamic evolution of flux distributions in a pulse-driven superconductor by high-speed magneto-optical imaging
Dynamic evolution of flux distributions in a pulse-driven superconductor by high-speed magneto-optical imaging
复制标题
高速磁光成像研究脉冲驱动超导体中磁通分布的动态演化
DOI：
10.1063/5.0015113
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
H. Kurokawa;Y. Kinoshita;F. Nabeshima;Masashi Tokunaga;Atsutaka Maeda
中科院分区：
文献类型：
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作者：
H. Kurokawa;Y. Kinoshita;F. Nabeshima;Masashi Tokunaga;Atsutaka Maeda
对磁通动力学的准确理解对于超导电路的设计和运行是至关重要的。用高速磁光显微镜观察了NbN带材中磁通密度分布随输运电流的时间演化过程。结果表明，即使在输运流作用下，对于涡旋的动态穿透和排斥，表面势垒也是必不可少的。这一特征对于正确理解最先进的超导设备的复杂行为非常重要。
The accurate understanding of flux dynamics is essential for the design and operation of superconducting circuits. The time evolution of flux-density distribution in an NbN strip by the transport current was observed using high-speed magneto-optical microscopy. It was determined that even for the dynamic penetration and exclusion of vortices under the transport current, the surface barrier is essential. This feature is important for the correct understanding of the complex behavior of state-of-the-art superconducting devices.