Thermogravimetric, thermopower, and electrical conductivity studies of the Ba sub 2 YCu sub 3 O sub 7-x system
Thesis/Dissertation
·
OSTI ID:5944509
The Ba{sub 2}YCu{sub 3}O{sub 7-x} system was investigated using thermogravimetric, thermopower, and d.c. electrical conductivity techniques. The system was found to exhibit a semiconductor to metallic transition coincident with the documented orthorhombic to tetragonal phase transition. Conduction is accomplished in the semiconducting phase by an activated small hopping polaron mechanism. The oxide was observed to be a p-type semiconductor over the temperature and oxygen activity ranges studied. The conductivity, carrier concentration, and mobility behaviors of the oxide are primarily functions of its oxygen content. All three properties exhibited only a slight temperature dependence. The carrier concentration is essentially constant at a given oxygen content.
- Research Organization:
- Missouri Univ., Rolla, MO (USA)
- OSTI ID:
- 5944509
- Country of Publication:
- United States
- Language:
- English
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Mon Oct 05 00:00:00 EDT 1987
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· Appl. Phys. Lett.; (United States)
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARRIER MOBILITY
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
INFORMATION
MATERIALS
MOBILITY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
P-TYPE CONDUCTORS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
SEMICONDUCTOR MATERIALS
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOELECTRIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARRIER MOBILITY
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
INFORMATION
MATERIALS
MOBILITY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
P-TYPE CONDUCTORS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
SEMICONDUCTOR MATERIALS
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOELECTRIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES