Raman microprobe investigation of laser-assisted chemically-induced oxygen variation in the high T sub c superconductors YBa sub 2 Cu sub 3 O sub x
Conference
·
· AIP Conference Proceedings (American Institute of Physics); (USA)
OSTI ID:6552428
- Department of Physics, University of South Florida, Tampa, FL (USA)
Effects of focused Ar{sup +} laser irradiation on YBa{sub 2}Cu{sub 3}O{sub {ital x}} in air, N{sub 2}, and O{sub 2} ambients were studied with a Raman microprobe. Drastic changes in the Cu-O stretching mode (A{sub g}) in our Raman spectra recorded in air ambient indicate an orthorhombic to tetragonal phase transformation in the YBa{sub 2}Cu{sub 3}O{sub {ital x}} sample. Laser irradiation of the sample in oxygen ambient shows a reversed behavior compared to that in air. When irradiated in nitrogen ambient, it shows additional Raman lines compared wot the spectra for the starting material. This may be due to formation of BaCuO{sub 2} and O(4) vacancies. The reversibility of oxygen exchange in nitrogen and oxygen ambient was also studied. The observed effects in the Raman spectra were interpreted as the chemically induced oxygen desorption and absorption assisted by Ar{sup +} laser irradiation.
- OSTI ID:
- 6552428
- Report Number(s):
- CONF-891092--
- Conference Information:
- Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 199:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL TEMPERATURE
CRYSTAL-PHASE TRANSFORMATIONS
HEATING
HIGH-TC SUPERCONDUCTORS
LASER SPECTROSCOPY
LASER-RADIATION HEATING
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLASMA HEATING
RAMAN SPECTROSCOPY
SPECTROSCOPY
STOICHIOMETRY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360206 -- Ceramics
Cermets
& Refractories-- Radiation Effects
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL TEMPERATURE
CRYSTAL-PHASE TRANSFORMATIONS
HEATING
HIGH-TC SUPERCONDUCTORS
LASER SPECTROSCOPY
LASER-RADIATION HEATING
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLASMA HEATING
RAMAN SPECTROSCOPY
SPECTROSCOPY
STOICHIOMETRY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES