Surface Analysis of C-Axis-Oriented YBa2Cu3O7-X Thin Films by QMS, XPS and LEED: Effects of In-Vacuum Annealing
- 1 August 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (8B) , L1458-1461
- https://doi.org/10.1143/jjap.30.l1458
Abstract
The effects of in-vacuum annealing on the crystallinity and superconductivity in the surface region of YBa2Cu3O7-X thin films were investigated by QMS, XPS and LEED. Contaminated and disordered layers, which were nonsuperconducting phase, covered the film surface after being exposed to air. Surface contaminants are removed by annealing at 350°C in ultra high vacuum. The orthorhombic YBa2Cu3O7-X (001) structure and superconducting phase are obtained at the outermost surface after annealing at 350-400°C.Keywords
This publication has 8 references indexed in Scilit:
- Core-level changes induced by oxygen inPhysical Review B, 1991
- Surface layers on superconducting Y-Ba-Cu-O films studied with x-ray photoelectron spectroscopyJournal of Applied Physics, 1990
- Gas adsorption and desorption characteristics of oxide superconducting powders.Journal of the Japan Society of Powder and Powder Metallurgy, 1990
- Reaction of nonaqueous halogen solutions with YBa2Cu3O7−xJournal of Applied Physics, 1989
- Chemical states of Ba instudied by x-ray photoelectron spectroscopyPhysical Review B, 1989
- Science and Technology of Thin Film SuperconductorsPublished by Springer Nature ,1989
- Chain-Fragment Doping and the Phase Diagram ofPhysical Review Letters, 1988
- Angle-resolved photoemission studies of single-crystalPhysical Review B, 1988