Effect of small changes in composition on the electrical and structural properties of YBa2Cu3O7 thin films
- 5 November 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 57 (19) , 2016-2018
- https://doi.org/10.1063/1.104152
Abstract
Epitaxial thin films of YBa2Cu3O7 have been grown in situ by evaporation onto (001) MgO substrates. The composition was varied systematically to investigate the effects of changes in Cu content and Ba/Y ratio on the film properties. The results demonstrate that deviations from stoichiometry at the limit of resolution of most analytic techniques can have a large effect on structural and transport properties, as well as causing marked changes in surface morphology. The best properties (Jc≳3×106 A/cm2 at 77 K) are only found for a narrow range of compositions, which can be readily identified from the surface morphology.Keywords
This publication has 10 references indexed in Scilit:
- Physical vapour deposition techniques for the growth of YBa2Cu3O7thin filmsSuperconductor Science and Technology, 1990
- In-situ growth of Y1Ba2Cu3O7-x films by molecular beam epitaxy with an activated oxygen sourcePhysica C: Superconductivity and its Applications, 1989
- Formation of As-Grown YBaCuO Thin Films by RF Magnetron Sputtering from Three TargetsJapanese Journal of Applied Physics, 1989
- Effect of Substrate Temperature and Composition on the Crystalline State of Ba2YCu3O7-δ Magnetron-Sputtered Thin FilmsJapanese Journal of Applied Physics, 1989
- In situ growth of superconducting YBaCuO using reactive electron-beam coevaporationIEEE Transactions on Magnetics, 1989
- Superconducting and structural properties of YBaCuO thin films deposited by inverted cylindrical magnetron sputteringZeitschrift für Physik B Condensed Matter, 1989
- High-temperature superconductivity in ultrathin films of Y1Ba2Cu3O7−xApplied Physics Letters, 1989
- Narrow tracks in YBa2Cu3O7 thin films defined by laser ablationApplied Physics Letters, 1989
- Epitaxial growth of YBa2Cu3O7−x thin films on (110) SrTiO3 single crystals by activated reactive evaporationApplied Physics Letters, 1988
- Coevaporation Of Y-Ba-Cu-O films in an ultra high vacuum plantPhysica C: Superconductivity and its Applications, 1988