Examination of Sorption-Desorption of Oxygen on YBa2Cu3O7-x Superconducting Oxide by TPD Technique
- 1 March 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (3A) , L337-339
- https://doi.org/10.1143/jjap.27.l337
Abstract
Temperature programed desorption (TPD) spectra of oxygen from YBa2Cu3O7-x compounds with different oxygen contents are reported in connection with their superconductivities. Superconducting orthorhombic samples (x<ca. 0.5) with a T c,end of ca. 90 K were found to have two desorption peaks (Peak I centered at 550°C and Peak II centered at ca. 660°C), while tetragonal samples (x>ca. 0.5) showing semiconductive behavior in the temperature range above 77 K had only Peak II. This implies that the oxygen desorbed as Peak I from orthorhombic samples is deeply correlated with the superconductivity.Keywords
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