X-Ray Photoelectron Spectroscopy Study of Samples in the Y-Ba-Cu-O system
Abstract
Superconducting ceramics that have critical temperatures which exceed the boiling point of liquid nitrogen (77 K) have been discovered. Preliminary studies both in the United States and Japan indicate that the superconducting properties of these ceramics can degrade with exposure to water vapor during processing. X ray photoelectron spectroscopy (XPS) is a possible method with which to study this problem. The goal of this research was to determine if there are features in the XPS spectra of these ceramics that a spectrometer with non-monochromatic radiation can use to study this reaction. As the first step in this determination, it was necessary to ascertain the extent to which this method can discriminate between the ceramic superconductor, YBa2Cu3O7, and a poorly superconducting two phase sample, (YBa2Cu3O7 and Y2BaCuO5). This latter sample results from processing errors when attempting to make signal phase YBa2CuO7. The core-level XPS spectra for these samples were acquired in this investigation. X ray photoelectron spectroscopy, Copper oxides, Superconductivity, Ceramics, Yhrium compounds, Barium compounds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1988
- Accession Number
- ADA206260
Entities
People
- B. Friedman
- L. F. Aprigliano
- R. J. Stockhausen