Nanosecond voltage pulses from dendritic flux avalanches in superconducting NbN films
Mikheenko, P., Qviller, A.J., Vestgården, J.I., Chaudhuri, S., Maasilta, I., Galperin, Y.M., & Johansen, T.H. (2013). Nanosecond voltage pulses from dendritic flux avalanches in superconducting NbN films. Applied Physics Letters, 102, Article 022601. https://doi.org/10.1063/1.4775693
Julkaistu sarjassa
Applied Physics LettersPäivämäärä
2013Tekijänoikeudet
© 2013 American Institute of Physics. Published in this repository with the kind permission of the publisher.
Combined voltage and magneto-optical study of magnetic flux flow in superconducting NbN films
is reported. The nanosecond-scale voltage pulses appearing during thermomagnetic avalanches
have been recorded in films partially coated by a metal layer. Simultaneous magneto-optical
imaging and voltage measurements allowed the pulses to be associated with individual flux
branches penetrating the superconductor below the metal coating. From detailed characteristics
of pulse and flux branches, the electrical field in the superconductor is found to be in the range of
5-50 kV/m, while the propagation speed of the avalanche during its final stage is found to be close
to 5 km/s.
Julkaisija
American Institute of PhysicsISSN Hae Julkaisufoorumista
0003-6951Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/23201227