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/]
Conference
·
OSTI ID:5848506
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. X-Ray Absorption Near Edge Structure and Moessbauer Spectroscopy were used to measure the valence of Cu, Pr, Eu, and Gd in La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/ and (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/. Results are presented, and the Cu valence as a function of oxygen concentration is discussed. 18 refs., 6 figs.
- Research Organization:
- Argonne National Lab., IL (USA); City Univ. of New York, NY (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5848506
- Report Number(s):
- CONF-870843-3; ON: DE88003100
- Country of Publication:
- United States
- Language:
- English
Similar Records
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/
X-ray-absorption studies of cation ordering and valence in the T sup * -phase La sub 2 minus x minus y R x Sr sub y CuO sub 4 ( R =Sm, Eu, Gd, Tb, and Dy) (US)
Valence bands, oxygen in planes and chains, and surface changes for single crystals of M/sub 2/CuO/sub 4/ and MBa/sub 2/Cu/sub 3/O/sub x/ (M = Pr,Nd,Eu,Gd)
Conference
·
Mon Nov 30 23:00:00 EST 1987
·
OSTI ID:5524010
X-ray-absorption studies of cation ordering and valence in the T sup * -phase La sub 2 minus x minus y R x Sr sub y CuO sub 4 ( R =Sm, Eu, Gd, Tb, and Dy) (US)
Journal Article
·
Tue Oct 01 00:00:00 EDT 1991
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:5172105
Valence bands, oxygen in planes and chains, and surface changes for single crystals of M/sub 2/CuO/sub 4/ and MBa/sub 2/Cu/sub 3/O/sub x/ (M = Pr,Nd,Eu,Gd)
Journal Article
·
Thu Sep 01 00:00:00 EDT 1988
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6844732
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
ENERGY-LEVEL TRANSITIONS
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VALENCE
X-RAY SPECTRA
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
ENERGY-LEVEL TRANSITIONS
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VALENCE
X-RAY SPECTRA
YTTRIUM COMPOUNDS
YTTRIUM OXIDES