Thermoelectric power measurements on Tl sub 2. 2 Ba sub 2 (Ca sub 2 minus x Y sub x )Cu sub 3 O sub Y
- Univ. of Colorado, Boulder (United States)
- Univ. of Arkansas, Fayetteville (United States)
- Univ. of Colorado, Boulder (United States) Univ. of Arkansas, Fayetteville (United States)
- Colorado School of Mines, Golden (United States)
- Inst. of Physics, Beijing (China)
Thermoelectric power, resistivity, ac susceptibility and structural properties of bulk samples with an initial composition of Tl{sub 2.2}Ba{sub 2}(Ca{sub 2{minus}x}Y{sub x})Cu{sub 3}O{sub y} are studied for the range 0.0 {le} x {le} 2.0. The Tl-based 2,223, 2,212 and 1,212 (Tl, Ba, Ca, Cu) crystal structures are identified in the multiphased samples. For x {le} 0.1 the 2,223 phase is predominant while for 0.5 {le} x {le} 2 the 1,212 phase predominates. As x is increased the critical temperature is observed to decrease and the thermoelectric power to increase. From the thermoelectric power measurements, it is determined that the Tl{sub 2.2}Ba{sub 2}(Ca{sub 2{minus}x}Y{sub x})Cu{sub 3}O{sub y} samples are p-type for all values of x studied. The thermoelectric power demonstrates a clear transition to superconductivity for x {le} 0.1, uncorrelated Fermi liquid behavior for 0.5 {le} x {le} 1.8 above 80K, and semiconductive behavior for x = 2 at all temperatures studied.
- OSTI ID:
- 5387497
- Journal Information:
- Applied Physics Communications; (United States), Journal Name: Applied Physics Communications; (United States) Vol. 10:4; ISSN 0277-9374; ISSN APCOD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
THERMOELECTRIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES