Regensburg 2004 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Postersitzung I: Supraleitung
TT 8.14: Poster
Montag, 8. März 2004, 14:30–19:00, Poster A
Preparation of perovskite buffer layers on surface oxidized Ni tapes for coated conductor applications — •R. Hühne1, B. Holzapfel1, A. Kursumovic2, B. A. Glowacki2, J. E. Evetts2, A. Cavallaro3, F. Sandiumenge3, A. Pomar3, T. Puig3, and X. Obradors3 — 1IFW Dresden, Germany — 2Department of Materials Science, University of Cambridge, UK — 3Institut de Ciencia de Materials de Barcelona, Spain
The preparation of cube textured NiO buffer layers on biaxially textured Ni tapes (RABiTS) using surface oxidation epitaxy (SOE) offers a cheap and scalable route for the production of long-length YBCO coated conductors. A second buffer layer is necessary to ensure epitaxial growth of the YBCO as well as to prevent Ni contamination of the superconducting layer. Therefore, different perovskite buffer were grown on SOE-NiO using pulsed laser deposition (PLD) and metal-organic decomposition (MOD). Ca0.6Sr0.4TiO3, BaZrO3 and SrZrO3 buffers were successfully deposited on NiO showing a high quality epitaxial growth with an in-plane orientation similar to the underlying NiO. The subsequent deposition of YBCO on top of these buffers using different methods resulted in epitaxial layers with a Tc0 above 83 K and jc up to 1 MA/cm−2. Microstructural investigations showed that in all cases the roughness and the surface topography of the buffer layers is mainly determined by the quality of the NiO layer.