期刊
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
卷 19, 期 6, 页码 521-527出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-2048/19/6/019
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The presence of impurities in the precursor metal carboxylate solutions for the preparation of epitaxial thin films by metal organic decomposition ( MOD) is substantially avoided by the use of acid anhydrides. In particular, trifluoroacetic anhydride ( TFAA) was used for the synthesis of the starting Y, Ba and Cu trifluoroacetates used in YBa2Cu3O7-x (YBCO) preparation by the MOD process. In this way, highly stable organometallic precursors and a short pyrolysis process could be used leading to YBCO films with high critical currents (J(c) >= 2-4 MA cm(-2) at 77 K). Furthermore, the reproducibility of the results has been ascertained.
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