Superconductivity of the Pr-substituted (Nd/sub 1-x/Pr/sub x/)Ba/sub 2/Cu/sub 3/O/sub 7-/delta// system
Electrical, magnetic and crystallographic measurements have been carried out for the pseudoquaternary (Nd/sub 1-x/Pr/sub x/)Ba/sub 2/Cu/sub 3/O/sub 7-/delta// system. Orthorhombic phase persists from chi = 0.0 up to chi = 0.7 and transforms into the tetragonal structure only for chi /ge/ 0.8. Superconducting transition temperature T/sub c/ decreases linearly from 92 K for chi = 0.0 to below 10 K for chi = 0.3 and extrapolated to 0 K around chi = 0.35. Magnetic susceptibility indicates that the valence of the Pr ion is close to 4+. Pr/sup 4+/ is a very powerful oxidizing agent and may distort or move oxygen away from the Cu-O chain and/or the /CuO/sub 2/ planes and seriously suppress superconductivity.
- Research Organization:
- National Tsing Hua Univ., Hsinchu (Taiwan). Dept. of Physics
- OSTI ID:
- 5828192
- Journal Information:
- Int. J. Mod. Phys. B; (United States), Vol. 2:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
SUPERCONDUCTIVITY
COPPER OXIDES
NEODYMIUM OXIDES
PROMETHIUM OXIDES
SUPERCONDUCTORS
CRYSTALLOGRAPHY
DATA ANALYSIS
DIFFUSION
ELECTRICAL PROPERTIES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
ORTHORHOMBIC LATTICES
OXYGEN
PHASE STUDIES
PROMETHIUM IONS
QUATERNARY ALLOY SYSTEMS
TETRAGONAL LATTICES
TRANSITION TEMPERATURE
VALENCE
ALKALINE EARTH METAL COMPOUNDS
ALLOY SYSTEMS
BARIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELEMENTS
IONS
NEODYMIUM COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROMETHIUM COMPOUNDS
RARE EARTH COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies