Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 7: Superconductivity & Solids At Low Temperature - Poster Session

TT 7.12: Poster

Montag, 27. März 2006, 14:00–17:45, P1

All CSD YBa₂Cu₃O_7−δ coated conductor on cube textured Ni-W substrates — •Kerstin Knoth, Sebastian Engel, Ruben Hühne, Steffen Oswald, Brigitte Schlobach, Steffen Strehle, Ludwig Schultz, and Bernhard Holzapfel — IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany

Chemical Solution Deposition (CSD) was used as a low cost method to prepare an all CSD YBa₂Cu₃O_7−δ (YBCO) coated conductor having a YBCO/CeO₂/La₂Zr₂O₇ (LZO)/Ni-5at%W architecture. The LZO and CeO₂ precursor solutions were prepared using new solution routes, whereas the trifluoroacetate (TFA) process was used for the preparation of the YBCO layer. A highly textured LZO/CeO₂ architecture was obtained on Ni-W after annealing at T_A = 900 ^∘C in a reducing atmosphere. The TFA-YBCO layer was deposited afterwards and annealed at T_A = 780 ^∘C. The characterization of the CSD YBCO coated conductor was done using X-Ray Diffraction (XRD), Reflection High Energy Electron Diffraction (RHEED), SEM, AFM, X-Ray Photoelectron Spectroscopy (XPS) and cross sectional analysis using the Focussed Ion Beam (FIB) technique. The TFA-YBCO(200 nm)/CeO₂(60 nm)/LZO(400 nm)/Ni-W coated conductor showed a T_c of 91.0 K with a Δ T_c of 1.2 K. The critical current density J_c was below 1.0 MA/cm² compared to a PLD-YBCO/PLD-CeO₂/LZO(400 nm)/Ni-W test sample (PLD - Pulsed Laser Deposition) with J_c = 1.0 MA/cm². Nevertheless, these results are very promising towards the realization of an all CSD YBCO coated conductor.