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    Cascade dynamics of thermomagnetic avalanches in superconducting films with holes

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    1249318.pdf (1.922Mb)
    Date
    2015
    Author
    Vestgården, Jørn Inge
    Colauto, Fabiano
    de Andrade, AMH
    Oliveira, AAM
    Ortiz, W. A.
    Johansen, Tom Henning
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    Abstract
    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.
    URI
    https://ffi-publikasjoner.archive.knowledgearc.net/handle/20.500.12242/481
    DOI
    10.1103/PhysRevB.92.144510
    Description
    Vestgården, Jørn Inge; Colauto, Fabiano; de Andrade, AMH; Oliveira, AAM; Ortiz, W. A.; Johansen, Tom Henning. Cascade dynamics of thermomagnetic avalanches in superconducting films with holes. Physical Review B. Condensed Matter and Materials Physics 2015 ;Volum 92.(14) s. -
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