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
- Resource Relation:
- Conference: Symposium on high temperature superconductors, Boston, MA, USA, 30 Nov 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5524010
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Related Subjects
36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
VALENCE
COPPER OXIDES
PRASEODYMIUM OXIDES
STRONTIUM OXIDES
YTTRIUM OXIDES
ABSORPTION SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
X-RAY SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
VALENCE
COPPER OXIDES
PRASEODYMIUM OXIDES
STRONTIUM OXIDES
YTTRIUM OXIDES
ABSORPTION SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
X-RAY SPECTRA
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity