X-ray and neutron diffracton study of La/sub 1/Ba/sub 2/Cu/sub 3/O/sub 9-//sub delta/: Influence of the Cu-O structure on T/sub c/

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.37.607· OSTI ID:5620153

Song, Y; Golben, J P; Chittipeddi, S; Lee, S I; McMichael, R D; Chen, X D; Gaines, J R; Cox, D L; Epstein, A J

X-ray and neutron diffraction studies on La/sub 1/Ba/sub 2/Cu/sub 3/O/sub 9-//sub delta/ demonstrate that the structure of this compound closely resembles that of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 9-//sub delta/. The importance of oxygen ordering on the outer Cu planes for high-T/sub c/ superconductivity is stressed. Broadening in the diffraction peaks as T/sub c/ is decreased is indicative of greater disorder in the La or Ba sites and/or the oxygen configuration. Evidence for the existence of octahedral Cu-O configurations between unit cells, possibly associated with a Ba-doped La/sub 3-//sub x/Ba/sub 3+//sub x/Cu/sub 6/O/sub 14+//sub y/ (x = 1) phase, is minimal.

• Research Organization: Department of Physics, Ohio State University, Columbus, Ohio 43210
• OSTI ID: 5620153
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DIFFRACTION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION