CaBaCuO ultrathin films and junctions (Articolo in rivista)

  • CaBaCuO ultrathin films and junctions (Articolo in rivista) (literal)
  • 2007-01-01T00:00:00+01:00 (literal)
  • 10.1109/TASC.2007.899390 (literal)
Alternative label
  • Born D.; Stornaiuolo D.; Tafuri F.; Medaglia P.G.; Orgiani P.; Balestrino G.; Lombardi F.; Kirtley J.R.; Kogan V.G. (2007)
    CaBaCuO ultrathin films and junctions
    in IEEE transactions on applied superconductivity (Print); IEEE-Institute Of Electrical And Electronics Engineers Inc., Piscataway (Stati Uniti d'America)
  • Born D.; Stornaiuolo D.; Tafuri F.; Medaglia P.G.; Orgiani P.; Balestrino G.; Lombardi F.; Kirtley J.R.; Kogan V.G. (literal)
Pagina inizio
  • 3581 (literal)
Pagina fine
  • 3584 (literal)
  • Conference: Applied Superconductivity Conference 2006 Location: Seattle, WA Date: AUG 27-SEP 01, 2006. Selected and revised paper. (literal)
  • (literal)
  • 17 (literal)
  • 4 (literal)
  • 2 (literal)
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
  • Univ Naples Federico 2, CNR, INFM, I-08126 Naples, Italy; Seconda Univ Napoli, I-81031 Aversa, Italy; Univ Roma Tor Vergata, CNR, INFM, I-00133 Rome, Italy; Chalmers, Dept Microelect & Nanosci, S-41296 Gothenburg, Sweden; Univ Gothenburg, S-41296 Gothenburg, Sweden; IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA; Iowa State Univ, Dept Phys & Astron, Ames, IA 50010 USA; Iowa State Univ, Ames Lab, Dept Energy, Ames, IA 50010 USA (literal)
  • CaBaCuO ultrathin films and junctions (literal)
  • We investigated transport properties of ultrathin CaBaCuO (CBCO) bridges, focusing on vortex dynamics, and Josephson bicrystal junctions. The CBCO films used are composed of a stacking sequence of two structural subunits having different functions, namely a Ba-based charge reservoir (CR) block and a Ca-based infinite layer (IL) superconducting block. SQUID microscopy investigations of these films provide Pearl lengths A more than the bridge widths. Measuring current-voltage characteristics we found evidence that at high temperatures the vortices are thermally activated at the edge of the bridge and pushed in, causing dissipation and a power-law dependence of the voltage from the current. At lower temperatures, the experimental curves change their shape. We compared these data with the predicted behavior for vortex quantum tunneling and we found very good agreement. Moreover, we have realized Josephson junctions composed of only a few superconducting CuO2 planes. The CBCO films used in these experiments are only 8 nm thick and have six superconducting CUO2 planes. The simple structure of the GB allows a reliable estimation of the coupling along the ab planes of the CuO2. We calculate for 24 degrees symmetric and asymmetric cases a critical current density per plane of about (1-3) kA/cm(2). (literal)
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