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DOI: 10.5445/IR/1000085883
Veröffentlicht am 24.09.2018

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.

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.

Zugehörige Institution(en) am KIT Institut für Mikro- und Nanoelektronische Systeme (IMS)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2158-3226
URN: urn:nbn:de:swb:90-858836
KITopen ID: 1000085883
Erschienen in AIP Advances
Band 8
Heft 8
Seiten Art. Nr.: 085128
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