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@ARTICLE{Faley:49944,
      author       = {Faley, M. M. and Jia, C. L. and Houben, L. and Meertens, D.
                      and Poppe, U. and Urban, K.},
      title        = {{M}eandering of the grain boundary and d-wave effects in
                      high-{T}c bicrystal {J}osephson junctions},
      journal      = {Superconductor science and technology},
      volume       = {19},
      issn         = {0953-2048},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PreJuSER-49944},
      pages        = {195 - 199},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We have produced submicrometre wide bicrystal Josephson
                      junctions on the basis of YBa2Cu3O7-delta (YBCO) films and
                      investigated their microstructure and superconducting
                      properties. A 300 nm thick buffer layer of SrTiO3 on the
                      SrTiO3 bicrystal substrates has helped to improve the
                      quality and reproducibility of the junctions. The surface of
                      the films at the grain boundary (GB) was investigated by
                      high-resolution scanning electron microscopy (HRSEM). This
                      has revealed one unit cell steps on the YBCO film surface
                      and meandering of the GB in the YBCO film. Planar
                      transmission electron microscopy investigations of the
                      junction have confirmed that the GB in YBCO had a linear
                      deviation from the underlying GB in the substrate up to
                      similar to 0.4 mu m. The observed spread of the angles of
                      the deviation of the GB in the film from the direction of
                      the GB in the substrate on the slot- and other defect-free
                      parts of the GB was below 10 degrees. Due to the d-wave
                      symmetry of the order parameter in YBCO the reduction of the
                      curvature of the GB leads to an improvement of the
                      homogeneity of the current flow and a doubling of the
                      critical current I-c of the junction. The observed IcRn
                      product of symmetric 20 degrees bicrystal junctions was
                      similar to 400 mu V at 77.4 K and similar to 1 mV at 63 K.
                      Integration of such junctions in SQUIDs with a square 16 mm
                      multilayer flux transformer has allowed us, for the first
                      time, to reach a field resolution for the high-T-c
                      magnetometers of similar to 3.5 fT Hz(-1/2) at 77.4 K.},
      keywords     = {J (WoSType)},
      cin          = {IFF-IMF / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB37 / $I:(DE-82)080009_20140620$},
      pnm          = {Kondensierte Materie / Grundlagen für zukünftige
                      Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK414 / G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Applied / Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000238405900007},
      doi          = {10.1088/0953-2048/19/5/S06},
      url          = {https://juser.fz-juelich.de/record/49944},
}