Berlin 2005 – wissenschaftliches Programm

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DS: Dünne Schichten

DS 23: Postersitzung I

DS 23.30: Poster

Freitag, 4. März 2005, 16:00–18:30, Poster TU B

YBCO thin films prepared by fluorine-free polymer-based chemical solution deposition — •Claudia Apetrii¹, Heike Schlörb¹, Martina Falter¹, Irene von Lampe², Ludwig Schultz¹, and Bernhard Holzapfel¹ — ¹IFW Dresden, Helmholzstr.20, 01069 Dresden — ²TU Berlin, Englischestr. 20, 10587 Berlin

We describe a chemical solution deposition (CSD) route towards inexpensive and environmentally friendly preparation of YBCO coated conductors. Stoichiometric amounts of Y-, Ba-, and Cu- nitrates were chosen as starting substances for the preparation of a polymer metal precursor solution. The starting substances and polyacrylic (or polymethacrylic) acid were dissolved in dimethylformamide (DMF), to obtain the precursor solution. The polymer metal precursor films were produced by spin coating of a stoichiometric solution onto SrTiO₃ single crystal substrate and then dried at 170^∘C in air. The heat treatment was performed in a tube furnace with a reaction temperature of 775^∘C. Good superconducting properties, with a inductively measured T_c of 90.4 K (ΔT_c=1.2 K) and J_c of 10⁶ A/cm² at 77K, have been obtained on epitaxially grown YBCO films using the polymer-based precursors.