X-ray absorption studies of La/sub 2-x/Sr/sub x/CuO/sub 4/ and Y/sub 1-x/Pr/sub x/Ba/sub 2/Cu/sub 3/O/sub 7-delta/
Conference
·
OSTI ID:5524010
The question of valence of Cu and rare-earth atoms in the newly discovered oxide superconductors with high transition temperatures is crucial to the understanding of their electronic structure. We have measured the X-Ray Absorption Near Edge Structure (XANES) of Cu K transition and Pr L/sub III/ transition to obtain information on the valence of Cu, and Pr in La/sub 2-x/Sr/sub x/CuO/sub 4/ and Y/sub 1-x/Pr/sub x/Ba/sub 2/Cu/sub 3/O/sub 7-delta/. We will present the experimental results, compare them with calculations of absorption cross-section for model atomic clusters, and discuss the valence of Cu as a function of oxygen concentration. 19 refs., 2 figs., 1 tab.
- Research Organization:
- Argonne National Lab., IL (USA); Brooklyn Coll., NY (USA); Northwestern Univ., Evanston, IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5524010
- Report Number(s):
- CONF-8711114-4; ON: DE88005982
- Country of Publication:
- United States
- Language:
- English
Similar Records
Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/]
Determination of valence of Cu in superconducting La/sub 2-//sub x/(Sr,Ba)/sub x/CuO/sub 4/
Origin of superconductivity suppression in (Dy{sub 1{minus}x}Pr{sub x})Ba{sub 2}Cu{sub 3}O{sub 7} studied by soft-x-ray absorption spectroscopy
Conference
·
Tue Sep 01 00:00:00 EDT 1987
·
OSTI ID:5848506
Determination of valence of Cu in superconducting La/sub 2-//sub x/(Sr,Ba)/sub x/CuO/sub 4/
Journal Article
·
Fri May 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6655987
Origin of superconductivity suppression in (Dy{sub 1{minus}x}Pr{sub x})Ba{sub 2}Cu{sub 3}O{sub 7} studied by soft-x-ray absorption spectroscopy
Journal Article
·
Sun Jun 01 00:00:00 EDT 1997
· Physical Review, B: Condensed Matter
·
OSTI ID:509052
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY SPECTRA
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY SPECTRA
YTTRIUM COMPOUNDS
YTTRIUM OXIDES