Published December 1, 1987
| Version v1
Journal article
Phonon characterization of YBa2(Cu/sub 1-//sub x/Al/sub x/)3O7/sub -//sub δ/ by Raman spectroscopy
- 1. GEC Research Limited, Hirst Research Centre, East Lane, Wembley, Middlesex HA9 7PP, United Kingdom
Description
We present new Raman scattering data on high-temperature superconducting materials with composition YBa2(Cu/sub 1-//sub x/Al/sub x/)3O7/sub -//sub δ/. In YBa2Cu3/sub 7-//sub δ/ we observe new high-frequency peaks greater than 700 cm/sup -1/ that we associate with two phonon interactions of the first-order Cu-O Raman vibrations that occur at 337, (450 +- 10) and 502 cm/sup -1/. The intensity of these new peaks suggest that anomalous phonon interactions are taking place. Results on Al substitution are consistent with a unit-cell change from orthorhombic to tetragonal. The observation of superconductivity in the tetragonal structure means that it is not possible to simply assign superconductivity to the orthorhombic structure
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 36
- Journal Issue
- 16
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 8315-8319
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19040080
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ALUMINIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; CRYSTAL-PHASE TRANSFORMATIONS; ORTHORHOMBIC LATTICES; PHONONS; RAMAN SPECTRA; SUPERCONDUCTIVITY; TETRAGONAL LATTICES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; QUASI PARTICLES; SPECTRA; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS