Published August 1, 1988
| Version v1
Journal article
High-temperature Raman measurements of single-crystal YBa2Cu3O/sub 7-//sub x/
- 1. Sandia National Laboratories, Livermore, California 94550
Description
We report in situ Raman spectra from single-crystal YBa2Cu3O/sub 7-//sub x/ in oxygen at temperatures from 20 to 770 0C and from YBa2Cu3O/sub 6.2/ in argon at temperatures from 20 to 545 0C. For YBa2Cu3O/sub 7-//sub x/ in oxygen, a defect-induced phonon at ∼570 cm/sup -1/ appears above ∼500 0C and increases in intensity with increasing temperature and loss of oxygen. As YBa2Cu3O/sub 6.2/ is heated above ∼100 0C, dramatic changes occur in the phonon bands, resulting from three-dimensional reorganization (disordering) of the oxygen in the structure involving the formation of oxygen vacancies at the O(4) sites
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 38
- Journal Issue
- 4
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 2914-2917
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19099189
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL STRUCTURE; HIGH TEMPERATURE; ORDER-DISORDER TRANSFORMATIONS; PHONONS; QUANTITY RATIO; RAMAN SPECTRA; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; VACANCIES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL DEFECTS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; POINT DEFECTS; QUASI PARTICLES; SPECTRA; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS