Energy of dendritic avalanches in thin-film superconductors
Qureishy, T., Vestgården, J. I., Qviller, A. J., Fjellvåg, A. S., Meckbach, J. M., Torgovkin, A., Johansen, T. H., Ilin, K., Siegel, M., Maasilta, I., & Mikheenko, P. (2018). Energy of dendritic avalanches in thin-film superconductors. AIP Advances, 8(8), Article 085128. https://doi.org/10.1063/1.5045682
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AIP AdvancesDate
2018Copyright
© 2018 Authors
A method for calculating stored magnetic energy in a thin superconducting film
based on quantitative magneto-optical imaging is developed. Energy and magnetic
moment are determined with these calculations for full hysteresis loops in a thin
film of the superconductor NbN. Huge losses in energy are observed when dendritic
avalanches occur. Magnetic energy, magnetic moment, sheet current and magnetic
flux distributions, all extracted from the same calibrated magneto-optical images,
are analyzed and discussed. Dissipated energy and the loss in moment when dendritic
avalanches occur are related to each other. Calculating these losses for specific
spatially-resolved flux avalanches is a great advantage, because of their unpredictable
and non-reproducible nature. The relative losses in energy are much higher than the
relative losses in moment.
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AIP Publishing LLCISSN Search the Publication Forum
2158-3226Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/28234156
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Research Council of FinlandFunding program(s)
Academy Project, AoFAdditional information about funding
The authors thank S. Kumar for assistance with dc magnetometry measurements. The Research Council of Norway is acknowledged for the support to the Norwegian Micro- and Nano-Fabrication Facility, NorFab (197411/V30), as is the Academy of Finland (Project no. 298667).License
Except where otherwise noted, this item's license is described as CC BY 4.0