Thin-film YBaCuO superconductors formed by Cu/BaO/Y2O3 layer structures
- 4 January 1988
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 52 (1) , 72-74
- https://doi.org/10.1063/1.99328
Abstract
Thin‐film superconductors of the YBaCuO family have been formed using layer structures of Cu, BaO, and Y2O3 deposited on different substrates by electron beam evaporation. Using a thickness ratio of Cu, BaO, and Y2O3 layers off that of the stoichiometric YBa2Cu3O7 phase, superconducting films were formed on MgO and SrTiO3 substrates, with a Tc for zero resistance exceeding 77 K. The films were found to be composed of the superconducting YBa2Cu3O7 phase and the green Y2BaCuO7 phase, with the excessive Cu repelled to the surface in an oxidized form. The studies also provide information on the dependence of the superconducting transition on the annealing temperatures and the substrates used.Keywords
This publication has 16 references indexed in Scilit:
- Superconducting Y-Ba-Cu-O oxide films by sputteringApplied Physics Letters, 1987
- Effect of crystal structure on superconductivity of Y-Ba-Cu-O system compoundsApplied Physics Letters, 1987
- Preparation of Y-Ba-Cu oxide superconductor thin films using pulsed laser evaporation from high T c bulk materialApplied Physics Letters, 1987
- Crystallography and microstructure of Y1Ba2Cu3O9−x, a perovskite-based superconducting oxideApplied Physics Letters, 1987
- Thin superconducting oxide filmsPhysical Review B, 1987
- Superconductivity above 90 K in the compound : Structural, transport, and magnetic propertiesPhysical Review B, 1987
- High Transition Temperature Superconductor: Y-Ba-Cu OxideJapanese Journal of Applied Physics, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- High-pressure study of the new Y-Ba-Cu-O superconducting compound systemPhysical Review Letters, 1987
- Bulk superconductivity at 36 K inPhysical Review Letters, 1987