Electron-spin-resonance studies of the Ag-, Eu-, and Gd-doped Y-Ba-Cu-O high-T/sub c/ superconductors
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
The electron-spin resonance (ESR) of pure and Ag-, Eu-, and Gd-doped YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ are measured at temperatures above and below the transition temperature T/sub c/. The ESR signals are speculated to be due to electrons in the d/sub x//sub <2/-y/sup =/ levels of the Cu/sup 2+/ ions hybridized with the oxygen 2p electrons in the tetragonal CuO/sub 4//sup 2+/ structure above the quasi Fermi level which lies at the middle of the Mott-Hubbard gap. For the pure orthorhombic structure or properly doped impure structures, the ESR signals disappear even at T>T/sub c/, implying a net spin S = 0 due to the super exchange force of the Cu/sup 2+/ ions through the intermediate oxygen atoms.
- Research Organization:
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
- OSTI ID:
- 6844768
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:7; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Thu Jan 07 19:00:00 EST 2021
· Physical Review. B
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OSTI ID:1850208
Studies of Y-Ba-Cu-O single crystals by x-ray absorption spectroscopy
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Fri Jan 31 23:00:00 EST 1992
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OSTI ID:10153990
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OSTI ID:5230002
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER IONS
COPPER OXIDES
COUPLING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DOPED MATERIALS
ELECTRON SPIN RESONANCE
EUROPIUM ADDITIONS
EUROPIUM ALLOYS
EXCHANGE INTERACTIONS
GADOLINIUM ADDITIONS
GADOLINIUM ALLOYS
HAMILTONIANS
HYBRIDIZATION
INTERACTIONS
INTERMEDIATE COUPLING
IONS
L-S COUPLING
MAGNETIC RESONANCE
MATERIALS
MATHEMATICAL OPERATORS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RESONANCE
SCATTERING
SILVER ADDITIONS
SILVER ALLOYS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER IONS
COPPER OXIDES
COUPLING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DOPED MATERIALS
ELECTRON SPIN RESONANCE
EUROPIUM ADDITIONS
EUROPIUM ALLOYS
EXCHANGE INTERACTIONS
GADOLINIUM ADDITIONS
GADOLINIUM ALLOYS
HAMILTONIANS
HYBRIDIZATION
INTERACTIONS
INTERMEDIATE COUPLING
IONS
L-S COUPLING
MAGNETIC RESONANCE
MATERIALS
MATHEMATICAL OPERATORS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RESONANCE
SCATTERING
SILVER ADDITIONS
SILVER ALLOYS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES