Josephson tunnel junctions in a magnetic field gradient

Publication: Research - peer-reviewJournal article – Annual report year: 2011

  • Author: Monaco, R.

    Universitá di Salerno, Italy, Istituto di Cibernetica del CNR, Comprensorio Olivetti

  • Author: Mygind, Jesper

    Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kongens Lyngby, Denmark

  • Author: Koshelets, V.P.

    Russian Academy of Science, Moscow, Russia, Kotel’nikov Institute of Radio Engineering and Electronics

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We measured the magnetic field dependence of the critical current of high-quality Nb-based planar Josephson tunnel junctions in the presence of a controllable nonuniform field distribution. We found skewed and slowly changing magnetic diffraction patterns quite dissimilar from the Fraunhofer-like ones typical of a homogeneous field. Our findings can be well interpreted in terms of recent theoretical predictions [R. Monaco, J. Appl. Phys. 108, 033906 (2010)] for a uniform magnetic field gradient, leading to Fresnel-like magnetic diffraction patterns. We also show that Fiske resonances can be suppressed by an asymmetric magnetic field profile. © 2011 American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Publication date2011
Volume98
Journal number7
Pages072503
ISSN0003-6951
DOIs
StatePublished

Bibliographical note

Copyright 2011 American Institute of Physics

CitationsWeb of Science® Times Cited: 2
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