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 04:00:00 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), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:4; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

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