6533b862fe1ef96bd12c6e09
RESEARCH PRODUCT
Energy of dendritic avalanches in thin-film superconductors
Atle Jorstad QvillerJ. M. MeckbachPavlo MikheenkoAndrii TorgovkinThomas QureishyTom H. JohansenTom H. JohansenJ. I. VestgårdenJ. I. VestgårdenIlari MaasiltaAsbjørn Slagtern FjellvågMichael SiegelKonstantin Ilinsubject
Materials sciencemedical imagingGeneral Physics and Astronomyclassical electromagnetism02 engineering and technologysuperconductors01 natural sciences7. Clean energysuprajohteetCondensed Matter::Superconductivity0103 physical sciencesThin film010306 general physicsEngineering & allied operationssuperconducting filmsSuperconductivityta114Magnetic energyCondensed matter physicsMagnetic momentDissipation021001 nanoscience & nanotechnologymagnetic hysteresislcsh:QC1-999Magnetic fluxMoment (mathematics)HysteresisFaraday effectthin filmsohutkalvotddc:6200210 nano-technologylcsh:Physicsdescription
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. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-01 |