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Cascade dynamics of thermomagnetic avalanches in superconducting films with holes

机译:带孔超导薄膜中热磁雪崩的级联动力学

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摘要

The submicrosecond dynamics of thermomagnetic avalanches in superconducting films with nonconducting holes (antidots) is considered. When such an avalanche reaches a hole, it is quickly filled with magnetic flux, and often its rim becomes unstable and a second avalanche is nucleated. In this work the time- and space-resolved behavior of such cascading avalanche behavior is determined using numerical simulations. Results are presented for films with holes of different shape. It is found that holes with sharp corners are those that most frequently create secondary avalanches, and they tend to nucleate in corners. Magneto-optical imaging of Nb films patterned with the same set of holes strongly supports the numerical results.
机译:考虑了具有非导电孔(解毒剂)的超导薄膜中热磁雪崩的亚微秒动力学。当这样的雪崩到达一个孔时,它很快被磁通量填充,并且其边缘常常变得不稳定并且第二雪崩成核。在这项工作中,使用数值模拟确定这种级联雪崩行为的时间和空间分辨行为。呈现了具有不同形状的孔的膜的结果。已发现,具有尖角的孔是最经常产生次级雪崩的孔,并且它们倾向于在角中成核。用同一组孔构图的Nb薄膜的磁光成像有力地支持了数值结果。

著录项

  • 来源
    《Physical review》 |2015年第14期|144510.1-144510.5|共5页
  • 作者单位

    Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316 Oslo, Norway,Norwegian Defence Research Establishment (FFI), Kjeller, Norway;

    Departamento de Fisica, Universidade Federal de Sao Carlos, 13565-905 Sao Carlos, SP, Brazil;

    Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil;

    Departamento de Fisica, Universidade Federal de Sao Carlos, 13565-905 Sao Carlos, SP, Brazil,Instituto Federal de Educacao, Ciencia e Tecnologia de Sao Paulo, Campus Matao, SP, Brazil;

    Departamento de Fisica, Universidade Federal de Sao Carlos, 13565-905 Sao Carlos, SP, Brazil;

    Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316 Oslo, Norway,Institute for Superconducting and Electronic Materials, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    superconducting films and low-dimensional structures; thermal stability; thermal effects; magnetic properties;

    机译:超导膜和低维结构;热稳定性;热效应;磁性;

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