Effects of Annealing Conditions and Substrate Materials on the Superconducting Properties of Ba2YCu3O7-y Films Prepared by the Dipping-Pyrolysis Process at 750°C
- 1 June 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (6A) , L1000
- https://doi.org/10.1143/jjap.30.l1000
Abstract
Superconducting Ba2YCu3O7-y (BYCO) films were prepared on various substrates by the dipping-pyrolysis process. The effects of annealing parameters, environment and time were also investigated. The 2-µm-thick films of BaCO3-Y2O3-CuO mixture were heat-treated at 750°C under a low-oxygen partial pressure (p(O2)=2×10-4 atm) followed by annealing under higher-p(O2) atmospheres. The resulting films showed high superconducting transition temperatures; values of T c,onset(s)'s were 89 K on SrTiO3(100), 86 K on LaAlO3(100), 86 K on yttria-stabilized zirconia (YSZ), 83 K on MgO(100), and 76 K on sapphire.Keywords
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