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Superconductivity of the Pr-substituted (Nd/sub 1-x/Pr/sub x/)Ba/sub 2/Cu/sub 3/O/sub 7-/delta// system

Journal Article · · Int. J. Mod. Phys. B; (United States)
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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), Journal Name: Int. J. Mod. Phys. B; (United States) Vol. 2:6; ISSN IJPBE
Country of Publication:
United States
Language:
English

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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
ALLOY SYSTEMS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
DATA ANALYSIS
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
IONS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NONMETALS
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
PROMETHIUM COMPOUNDS
PROMETHIUM IONS
PROMETHIUM OXIDES
QUATERNARY ALLOY SYSTEMS
RARE EARTH COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VALENCE