Publication Type:Journal Article
Source:Journal of Materials Research, Volume 5, Number 4, p.704-716 (1990)
Keywords:Ceramic Materials - Defects, electric conductivity, Films - Superconducting, High temperature superconductors, laser deposition, Low Temperature Properties, Stacking Defects, Superconducting materials, thin films, Yttrium barium copper oxides, Yttrium Compounds - Defects
Structural defects in thin films of nominal composition YBa2Cu3O7 (123) grown on single crystal MgO have been characterized. The main types of stacking defects correspond to the cationic stoichiometries of “248”, “247”, and “224”. Several types of edge dislocations have been observed. Due to the frequent changes in the stacking sequence, antiphase boundaries are created to accommodate the misfit across regions in which the repeat sequence is not identical. The films exhibit a mosaic microstructure due to the formation of grain boundaries in the a-b plane. © 1990, Materials Research Society. All rights reserved.
cited By 51