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@PHDTHESIS{Thyssen:36409,
      author       = {Thyssen, N.},
      title        = {{M}ulti-layer {J}osephson tunnel junctions},
      volume       = {3656},
      issn         = {0944-2952},
      school       = {Univ. Erlangen-Nürnberg},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum, Zentralbibliothek},
      reportid     = {PreJuSER-36409, Juel-3656},
      series       = {Berichte des Forschungszentrums Jülich},
      year         = {1999},
      note         = {Record converted from VDB: 12.11.2012; Erlangen-Nürnberg,
                      Univ., Diss., 1999},
      abstract     = {The most important active element in superconducting
                      circuits are Josephson junctions. Their high frequency
                      properties motivated many different projects to implement
                      Josephson junctions in circuits for active and passive
                      devices. The limiting points for applications in the low
                      temperature superconducting field are broad line width and
                      small power of a single Josephson junctions. The present
                      work presents experimental and theoretical investigations on
                      vertical stacked Josephson junctions in linear or annular
                      geometry. Presenting results of up to 28 stacked elements is
                      the state of the art of preparing stacked Low-T, Josephson
                      Tunnel Junctions. Stacks of up to 10 junctions show a
                      parameter spread of less than $5\%$ due to the developed
                      preparation procedures. Magnetic flux quanta in Josephson
                      junctions, called fluxons, in many cases behave as solitons.
                      Recent experiments and modeling offluxon dynamics in annular
                      Josephson junctions show the influence of an external
                      magnetic field on a single moving fluxon. The resulting
                      dynamics are strongly analogous to the motion of a particle
                      in a washboard potential. Experiment, theoretical model and
                      numerical simulations are in good agreement. Experiments on
                      fluxons in two-fold stacks show the dynamic and static
                      properties of this configuration. The critical current
                      dependence on the external magnetic field displays different
                      possible values, due to the voltage states of the junctions.
                      First experimental hints on Cherenkov radiation by resonant
                      structures in the current-voltage (I-V) characteristic is
                      found with stacks prepared during this work. The flux-flow
                      dynamics in N-Iayered Nb/AI-AIOJNb Josephson tunnel
                      junctions is investigated experimentally and by numerical
                      simulations. Collective flow of Josephson vortices is
                      displayed in the magnetic field dependent I-V
                      characteristics as cavity-like resonances. Numerical
                      calculations with a finite difference method, using the
                      coupled sineGordon equation explain these structures,
                      accounted by the calculated characteristic frequencies.
                      Voltage-locked flux-flow motion in the inner junctions is
                      found. The difference to the outer junctions is explained by
                      the film thickness which leads to higher fluxon numbers in
                      those junctions. Numerical data and experiments show very
                      good overall agreement. First experimental results on
                      radiation emission of stacked junctions are shown. First
                      results about sub-micrometer junction preparation and high
                      quality junctions in X-band coupling circuits show the broad
                      field of application for the developed preparation machine
                      and procedures.},
      cin          = {ISI},
      cid          = {I:(DE-Juel1)ISI-20090406},
      pnm          = {ohne FE},
      pid          = {G:(DE-Juel1)FUEK307},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/36409},
}