Abstract
Since the discovery of the high-T/sub c/ superconductors, the main technical interest focuses on Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) and Bi/sub 2/Sr/sub 2/Ca/sub 1/Cu/sub 2/O/sub 8+/spl delta// (BSCCO-2212) because of their high transition temperature and their reproducible fabrication. YBCO is mainly used today because of the relative ease of preparation. Thin BSCCO films can be deposited with nearly the right stoichiometry, but there are very few publications which report a transition temperature near the optimum value of 94 K. We report the optimization of the surface of YBCO thin films. The optimization of BSCCO-2212 films with respect to the right oxygen content is presented as well as preliminary results for Y-doped BSCCO films.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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