BIAXIALLY ORIENTED METALLIC TAPE SUBSTRATES FOR HIGH-TEMPERATURE SUPERCONDUCTORS

We report a practical synthesis route for the production of long lengt h, biaxially-oriented high-temperature superconducting (HTS) deposits on metallic tapes. The technique involves epitaxial vapor deposition o f appropriate oxide buffer layers on rolled, thermo-mechanically proce ssed fee-structure base-metal tape substrates. Short segments of simil ar to 1 mu m thick YBa2Cu3O7-delta deposits produced by pulsed laser a blation on CeO2 and yttria-stabilized ZrO2 (YSZ) buffered nickel exhib it epitaxial biaxial alignment and have critical current densities ove r 10(6) A/cm(2) at 77 K in zero applied magnetic field.