Preparation of High-Jc Ba2YCu3O7-y Films on SrTiO3 (100) Substrates by the Dipping-Pyrolysis Process at 750°C
- 1 September 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (9B) , L1641
- https://doi.org/10.1143/jjap.30.l1641
Abstract
Superconducting Ba2YCu3O7-y films were prepared on SγTiO3 (100) substrates by the dipping-pyrolysis process using metal acetylacetonates as starting materials. Prefired films were heat-treated at 750°C under a low-oxygen partial pressure (p(O2)=2×10-4 atm) and then annealed in O2. The resulting films showed high superconducting transition temperatures; both of the values of T c,onset(s) and T c,zero(r) were 89 K. The current-voltage characteristics of the films were measured at 74-86 K. The critical current at 77 K and 0 T was 2.4 A, which corresponds to the critical-current density of 3.9×105 A/cm2.Keywords
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