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Energy of dendritic avalanches in thin-film superconductors

Qureishy, T.; Vestgården, J. I.; Qviller, A. J.; Fjellvåg, A. S.; Meckbach, J. M. 1; Torgovkin, A.; Johansen, T. H.; Ilin, K. 1; Siegel, M. 1; Maasilta, I.; Mikheenko, P.
1 Institut für Mikro- und Nanoelektronische Systeme (IMS), Karlsruher Institut für Technologie (KIT)


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.

Verlagsausgabe §
DOI: 10.5445/IR/1000085883
Veröffentlicht am 24.09.2018
DOI: 10.1063/1.5045682
Zitationen: 4
Web of Science
Zitationen: 3
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikro- und Nanoelektronische Systeme (IMS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 2158-3226
KITopen-ID: 1000085883
Erschienen in AIP Advances
Verlag American Institute of Physics (AIP)
Band 8
Heft 8
Seiten Art. Nr.: 085128
Nachgewiesen in Dimensions
Web of Science
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