Oxygen stoichiometry in Ba sub 2 YCu sub 3 O sub x , Ba sub 2 GdCu sub 3 O sub x and Ba sub 2 EuCu sub 3 O sub x superconductors as a function of temperature

Conference · Wed Jul 01 04:00:00 EDT 1987 · Advanced Ceramic Materials; (USA)

OSTI ID:5124194

Grader, G S; Gallagher, P K ^[1]

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1. AT and T Bell Labs., Murray Hill, NJ (USA)

The oxygen stoichiometry of Y, Gd and Eu containing superconducting perovskites (of the form Ba{sub 2}YCU{sub 3}O{sub x}) was determined by measuring the oxygen evolution of these materials (in an initially evacuated closed system), as a function of temperature. Results show that both Eu and Gd containing superconductors undergo the orthorhombic/tetragonal phase transition at a lower temperature than the Y analog, and that the Gd-sample tetragonal phase exhibits semiconductor behavior.

• OSTI ID: 5124194
• Report Number(s): CONF-8704372--
• Conference Information: Journal Name: Advanced Ceramic Materials; (USA) Journal Volume: 2:3B
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STOICHIOMETRY
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES