Articles you may be interested inDouble-sided reel-to-reel metal-organic chemical vapor deposition system of YBa2Cu3O7-δ thin films J. Vac. Sci. Technol. A 32, 041512 (2014); 10.1116/1.4884367 4-fold enhancement in the critical current density of YBa2Cu3O7 films by practical ion irradiation

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We have routinely obtained high critical current density (J c ) YBa 2 Cu 3 O 7−x (YBCO) film by metalorganic deposition using trifluoroacetates (TFA-MOD). This method requires a relatively long calcining process of 9-17 h to obtain the optimal J c for 0.15 nm thick film. To apply this method to long wires and tapes, we need to know the thickness dependence of the calcining condition. We found that the optimal time of about 10 h was independent of the final thickness of 150, 180 or 240 nm. Furthermore, the results imply that the chemical reaction during the calcining process was decomposition and that a large-area film could be calcined with the same profile as used for a short one. We successfully calcined seven YBCO films using this profile on 10 × 10 mm LaAlO 3 single crystals in a line. All fired films were 156-188 nm thick and had J c of 5.53-6.73 MA cm −2 (77 K, 0 T) as measured by the four-probe method.

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