Luminescent properties of x-irradiated rare-earth-doped barium copper oxides
Journal Article
·
· J. Mat. Res.; (United States)
Thermally stimulated luminescence (TSL) of x-ray-induced defects in R--Ba--Cu--O (R = Gd, Ho, and Eu) has been measured. In the interval 25--400 /sup 0/C, Ho- and Eu-doped samples exhibit similar TSL with peaks at 65, 135, and 185 /sup 0/C. The GdBa/sub 2/Cu/sub 3/O/sub x/ has, in addition to the three aforementioned peaks, a maximum at 310 /sup 0/C. All TSL peaks are attributed to recombination of F/sup +//sub s/- and F/sub s/- center electrons with V/sub s/- type holes, requiring typical thermal activation energies 0.5--1.0 eV. Spectral emission data support this conclusion. Irreversible quenching of TSL is found to occur in each sample. It is postulated that adsorbed oxygen molecules interact with radiation-induced F/sup +//sub s/ and F/sub s/ centers to produce O/sup -//sub 2/ and O/sup 2-//sub 2/ molecular ions, respectively, thereby reducing the surface oxygen vacancy concentration and quenching the luminescence. In addition to activation energies, other TSL parameters are extracted from the data. It is suggested that surface TSL in these oxide superconductors is independent of rare-earth dopant.
- Research Organization:
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 6047300
- Journal Information:
- J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 2:6; ISSN JMREE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COLOR CENTERS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
F CENTERS
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HIGH TEMPERATURE
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
IONIZING RADIATIONS
LUMINESCENCE
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION EFFECTS
RADIATIONS
RARE EARTH COMPOUNDS
SPECTRA
THERMOLUMINESCENCE
TRANSITION ELEMENT COMPOUNDS
VACANCIES
X RADIATION
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COLOR CENTERS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
F CENTERS
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HIGH TEMPERATURE
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
IONIZING RADIATIONS
LUMINESCENCE
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION EFFECTS
RADIATIONS
RARE EARTH COMPOUNDS
SPECTRA
THERMOLUMINESCENCE
TRANSITION ELEMENT COMPOUNDS
VACANCIES
X RADIATION