Abstract
We discuss two methods tor the ex-situ furnace growth of pure TIBaCaCuO superconducting thin films on LaAlO3(100) substrates. The traditional approach of “crucible processing” is used to grow high-quality films of several of the TIBaCaCuO phases. “Two-zone processing” promises greater thermodynamic control, yet film properties from optimized films are not as good as those grown from crucibles. The transport kinetics of Tl-oxide vapor from a source to the film surface appears to be a dominant factor. The best results are from single-phase Tl-1212 and Tl-2212 thin films. Tc's are high and sharp, Jc's > 1 × 107 A/cm2 at 5 K, and surface morphologies are relatively smooth.
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Siegal, M.P., Venturini, E.L., Overmyer, D.L. et al. Growth and Characterization of TlBaCaCuO Thin Films. Journal of Superconductivity 11, 135–138 (1998). https://doi.org/10.1023/A:1022687408646
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DOI: https://doi.org/10.1023/A:1022687408646