Ordering in Tl sub 2 CaBa sub 2 Cu sub 2 O sub 8 and Tl sub 2 Ba sub 2 CuO sub 6 studied by pair distribution function and Rietveld analysis

Conference · Fri Sep 01 00:00:00 EDT 1989

OSTI ID:6818956

Toby, B H; Dmowski, W; Egami, T ^[1]; Jorgensen, J D ^[2]; Subramanian, M A; Gopalakrishnan, J; Sleight, A W; Parise, J B ^[3]

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1. Pennsylvania Univ., Philadelphia, PA (USA)
2. Argonne National Lab., IL (USA)
3. Du Pont de Nemours (E.I.) and Co., Wilmington, DE (USA). Central Research and Development Dept.

Rietveld analysis indicates that the only long-range structural variation in Tl{sub 2}CaBa{sub 2}Cu{sub 2}O{sub 8} with temperature is a shift of O(2) away from Cu and toward Ba with increasing T. Atomic pair distribution function analysis on two samples of Tl{sub 2}Ba{sub 2}CuO{sub 6}, one superconducting, the other not, shows substantial differences in their short range structure, but similar medium range structures, while Rietveld analysis shows very similar lattice constants and long-range structures. 5 refs., 2 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER; NSF
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6818956
• Report Number(s): CONF-890718-36; ON: DE90013669; CNN: DMR-8519059; DMR-8617950
• 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
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ORDER PARAMETERS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRUCTURAL CHEMICAL ANALYSIS
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS