The liquid phase epitaxy (LPE) grown YBa2Cii3Ox (YBCO) thick films are characterized as a superconductive substrate in comparison with bulk YBCO single crystal substrates. We have focused on the study of the chemical treatments improving (001) YBCO surface which is mechanically polished. The reaction of the YBCO surface with the HCl/absolute methanol solution is effective for removing damaged remnants on the surface without roughening. Resulting surfaces are precisely examined by observations of atomic force microscopy. The topographical image and its line profile have confirmed that (001) YBCO surfaces are terminated by a unique atomic layer. The chemical stability is also examined under the conditions that additional depositions are followed to form a multilayer structure for devices. Homoepitaxial YBCO films have been grown on chemically treated YBCO substrates by metalorganic chemical vapor deposition, and are compared with those on the substrates without the chemical treatments.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering