Cu-O vibrations of Ba/sub 2/YCu/sub 3/O/sub x/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We present Raman and infrared absorption data for Ba/sub 2/YCu/sub 3/O/sub x/ with 7>x>6 for several samples with well-characterized oxygen content. Over this range the material has an oxygen-deficient tripled perovskite structure whose superconductivity properties depend critically on x. An orthorhombic-to-tetragonal transition occurs for xapprox. =6.5. We have examined both phases for the frequency range ..omega..>400 cm/sup -1/ which contains the Cu-O bond-stretching vibrations. A force-constant model has been developed which allows us to assign the features in the spectra. Our results are consistent with the linear Cu-O-Cu-O chains in Ba/sub 2/YCu/sub 3/O/sub 7/ being absent in the nonsuperconducting Ba/sub 2/YCu/sub 3/O/sub 6/.
- Research Organization:
- ATandT Bell Laboratories, Murray Hill, New Jersey 07974
- OSTI ID:
- 5923245
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-frequency Raman scattering in the superconducting and semiconducting phases of Ba/sub 2/YCu/sub 3/O/sub x/-type single crystals and ceramics
Raman scattering from triple perovskites with the Ba/sub 2/YCu/sub 3/O/sub x/ structure: Normal mode assignments from substitutions on the Ba site
X-ray-scattering study of finite-range order in Ba/sub 2/YCu/sub 3/O/sub 6. 7/
Journal Article
·
Wed Nov 30 23:00:00 EST 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6889736
Raman scattering from triple perovskites with the Ba/sub 2/YCu/sub 3/O/sub x/ structure: Normal mode assignments from substitutions on the Ba site
Journal Article
·
Sat Dec 31 23:00:00 EST 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6441579
X-ray-scattering study of finite-range order in Ba/sub 2/YCu/sub 3/O/sub 6. 7/
Journal Article
·
Sun May 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:5220948
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL BONDS
COHERENT SCATTERING
COPPER
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY-LEVEL DENSITY
INFRARED SPECTRA
LATTICE PARAMETERS
METALS
NONMETALS
ORTHORHOMBIC LATTICES
OSCILLATIONS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHONONS
PHYSICAL PROPERTIES
POWDERS
QUASI PARTICLES
RAMAN SPECTRA
SCATTERING
SPECTRA
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL BONDS
COHERENT SCATTERING
COPPER
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY-LEVEL DENSITY
INFRARED SPECTRA
LATTICE PARAMETERS
METALS
NONMETALS
ORTHORHOMBIC LATTICES
OSCILLATIONS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHONONS
PHYSICAL PROPERTIES
POWDERS
QUASI PARTICLES
RAMAN SPECTRA
SCATTERING
SPECTRA
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES