Resistivity and thermoelectric-power measurements of Pr sub x Y sub 1 minus x Ba sub 2 Cu sub 3 O sub 7 minus. delta. up to 1200 K and an electronic-structure analysis

Journal Article · Fri Feb 01 00:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.2821· OSTI ID:5734977

Fisher, B; Genossar, J; Patlagan, L ^[1]; Ashkenazi, J ^[2]

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1. Department of Physics, Technion-Israel Institute of Technology, 32000 Haifa, Israel (IL)
2. Department of Physics, University of Miami, Box 248046, Coral Gables, Florida 33156 (USA)

We report measurements of absolute thermoelectric power and resistivity in Pr{sub {ital x}}Y{sub 1{minus}{ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, as function of {ital x} and {delta}, over a wide temperature range. At high temperature, the substitution of Pr for Y does not affect the thermopower and resistivity; Pr behaves then as a trivalent ion: Pr{sup 3+}. For small {ital x} and {delta} the effects of substitution of Y by Pr and of oxygen deficiency on the low-temperature resistivity are additive. A simple electronic-structure model is proposed to account for thermopower as function of temperature, {ital x}, and {delta}.

• OSTI ID: 5734977
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:4; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ELECTRIC CONDUCTIVITY
THERMOELECTRIC PROPERTIES
COPPER OXIDES
YTTRIUM OXIDES
ELECTRONIC STRUCTURE
HIGH TEMPERATURE
PRASEODYMIUM ADDITIONS
QUANTITY RATIO
SUPERCONDUCTIVITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM ALLOYS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties