Oxygen desorption from YBa sub 2 Cu sub 3 O sub 7 minus sub x and Bi sub 2 CaSr sub 2 Cu sub 2 O sub 8+. delta. superconductors
Journal Article
·
· Journal of Applied Physics; (USA)
- Department of Physics and Space Vacuum Epitaxy Center, University of Houston, Houston, Texas 77204-5507 (USA)
Oxygen desorption experiments from YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} (YBCO) and Bi{sub 2}CaSr{sub 2}Cu{sub 2}O{sub 8+{delta}} (BSCCO) superconductors were carried out using a quadrupole mass spectrometer for monitoring the desorbing species and x-ray photoemission spectroscopy for surface characterization. Molecular oxygen was found to desorb from both superconductors following photoirradiation with ultraviolet/optical radiation and subsequent heating at over 150 {degree}C. Both YBCO and BSCCO were found to have similar oxygen desorption rates and similar activation energies (10{sup 12}--10{sup 13} molecules/cm{sup 2} s and {similar to}1.5 eV/molecule, respectively). The desorption data as well as the x-ray photoemission data indicate that the oxygen desorption is not intrinsic to the superconductors but rather due to molecular oxygen entrapped in the material.
- OSTI ID:
- 5622479
- Journal Information:
- Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 70:3; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:7158447
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DESORPTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
HEATING
HIGH TEMPERATURE
IONIZING RADIATIONS
MASS SPECTROSCOPY
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION
VISIBLE RADIATION
X RADIATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DESORPTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
HEATING
HIGH TEMPERATURE
IONIZING RADIATIONS
MASS SPECTROSCOPY
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION
VISIBLE RADIATION
X RADIATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES