Composition-induced superconductivity (up to 55 K) in the system (Pb sub 0. 75 Cu sub 0. 25 )Sr sub 2 (Ca sub 1 minus x Y sub x )Cu sub 2 O sub 7 minus. delta

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1016/0022-4596(91)90301-W· OSTI ID:7164787

Liu, R S; Hu, S F; Gameson, I; Edwards, P P ^[1]; Maignan, A; Rouillon, T; Groult, D; Raveau, B ^[2]

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1. Univ. of Cambridge (United Kingdom)
2. Lab. CRISMAT-ISMRa, Caen (France)

The authors demonstrate a compositionally induced superconductor-to-semiconductor transition in the system (Pb{sub 0.75}Cu{sub 0.25})Sr{sub 2}(Ca{sub 1{minus}x}Y{sub x})Cu{sub 2}O{sub 7-{delta}}. Superconducting behavior is observed over the composition range 0.1 {le} x {le} 0.6. Samples with 0.1 {le} x {le} 0.3 are multiphasic, but the superconducting transition temperature is a maximum (55 K) over this range of compositions. The sample having x = 0.5 gives rise to an acceptable phase purity, a superconducting transition temperature of 45 K, and the maximum superconducting (Meissner) volume fraction (20.2%). A superconductor-to-semiconductor transition occurs at x = 0.7.

• OSTI ID: 7164787
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 93:1; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
CALCINATION
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPES
FABRICATION
HEXAGONAL LATTICES
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MATERIALS
MICROSCOPES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDERS
PYROLYSIS
SEMICONDUCTOR MATERIALS
SINTERING
SPECTROSCOPY
STRONTIUM CARBONATES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0013-0065 K
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY SPECTROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES