Berlin 2005 – scientific programme
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TT: Tiefe Temperaturen
TT 23: Posters Superconductivity, Solids at Low Temperature
TT 23.9: Poster
Monday, March 7, 2005, 14:00–18:00, Poster TU D
La2Zr2O7 buffer layers on Ni RABiTS for YBCO coated conductors using chemical solution deposition — •Kerstin Knoth, Sebastian Engel, Ruben Hühne, Heike Schlörb, Ludwig Schultz, and Bernhard Holzapfel — IFW Dresden, Helmholtzstrasse 20, 01069 Dresden
Chemical Solution Deposition (CSD), as a low-cost method for producing YBCO coated conductors, has been used to prepare La2Zr2O7(LZO) buffer layers on Ni RABiTS. The LZO precursor solution was prepared by dissolving La-, and Zr-2.4-pentanedionates in propionic acid. Solutions with different concentrations as well as variable dip coating speeds were examined to obtain thick and crack free LZO layers on Ni substrates (10 mm x 10mm). During the heat treatment at temperatures around 900∘C in a reducing atmosphere, highly textured LZO buffer layers were grown. The texture quality was determined using X-Ray Diffraction (XRD) and Reflection High Energy Electron Diffraction (RHEED). The LZO buffer layers show a strong c-axis orientation in θ−2θ scans and a very good in-plane alignment on Ni, with FWHM values of 6.9∘ (Ni: 6.0∘) and 7.2∘ (Ni:6.0∘) for the in-plane and out-of-plane orientations. Further analyses by SEM and Atomic Force Microscopy (AFM) show dense and crack free layers. The LZO solution was also applied to long lengths using a reel-to-reel dip coating and drying unit. XRD analyses of first longer samples show good c-axis orientation. AFM and SEM investigations are in progress.