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DOI: 10.1109/77.621903
Zitationen: 8
Web of Science
Zitationen: 9

Experimental study of flux flow and resonant modes in multi-junction Josephson stacks

Thyssen, N.; Kohlstedt, H.; Ustinov, Alexey V.

Magnetic field dependence of current-voltage characteristics of 7-layer stacked Nb/Al-AlO/sub x//Nb long Josephson junctions are investigated experimentally. The magnetic coupling between the junctions is provided by their common superconducting electrodes of the thickness smaller than the London penetration depth. The current-voltage characteristics clearly display collective flux-flow behaviour of Josephson vortices (fluxons) which simultaneously move in up to 5 layers of the stack under the influence of the bias current. The flux-flow behaviour is modulated by a complicated structure of cavity-like resonances which show a broad range of characteristic frequencies. Our observations can be qualitatively explained as the interplay between the Fiske modes and the two-dimensional resonances in these stacks. For the intermediate magnetic field range, we find pronounced resonant modes with large voltage spacing which indicates mutually coherent operating junctions.

Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 1997
Sprache Englisch
Identifikator ISSN: 1051-8223, 1558-2515
KITopen-ID: 1000075677
Erschienen in IEEE transactions on applied superconductivity
Band 7
Heft 2
Seiten 2901–2904
Nachgewiesen in Web of Science
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