Potassium substitution for barium in RBa/sub 2/Cu/sub 3/O/sub 7/ (R = Y, Eu, Pr)
Journal Article
·
· Mod. Phys. Letters B; (United States)
The authors have studied the crystal structure, magnetic susceptibility, and oxygen concentration in single-phase samples of high T/sub c/RBa/sub 2-y/K/sub y/CU/sub 3/IO/sub x/ (where y = 0 to 1 for R = Y and Eu), and in nonsuperconducting PrBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ (y = 0 to 1.5). The YBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ samples all have the same orthorhombic structure and almost the same T/sub c/, even though chi = 6.1 for y = 1. EuBa/sub 2-y/K/sub y/Cu/sub 3/O/sub chi/ evolves from orthorhombic to tetragonal structure, and T/sub c/ progressively drops, with increasing y; for y = 1 it is no longer superconducting. The mixed-valent Pr in PrBa/sub 2/Cu/sub 3/O/sub 7/ becomes tetravalent in the presence of /Kappa//sup +/ ions substituted for Ba/sup ++/. The decrease in cation charge reduces both the oxygen concentration and the average valency of the Cu in all three systems.
- Research Organization:
- Hebrew Univ., Jerusalem (Israel). Racah Inst. of Physics
- OSTI ID:
- 5616665
- Journal Information:
- Mod. Phys. Letters B; (United States), Journal Name: Mod. Phys. Letters B; (United States) Vol. 2:5; ISSN MPLBE
- Country of Publication:
- United States
- Language:
- English
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Sat Oct 01 00:00:00 EDT 1988
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High-temperature resistivity of RBa/sub 2/Cu/sub 3/O/sub 7-//sub y/, where R = La, Pr, Nd, Sm, Eu, Dy, Ho, Er, and Tm
Journal Article
·
Mon May 01 00:00:00 EDT 1989
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6292850
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EUROPIUM
IONS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
METALS
NONMETALS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
POINT DEFECTS
POTASSIUM IONS
PRASEODYMIUM
RARE EARTHS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
VALENCE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EUROPIUM
IONS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
METALS
NONMETALS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
POINT DEFECTS
POTASSIUM IONS
PRASEODYMIUM
RARE EARTHS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
VALENCE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES