Thermoelectric power and resistivity measurements on oxygen-annealed HgBa[sub 2]Ca[sub 2]Cu[sub 3]O[sub 8+[delta]] superconductors

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.51.1330· OSTI ID:7060871

Subramaniam, C K ^[1]; Paranthaman, M ^[2]; Kaiser, A B ^[1]

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1. Physics Department, Victoria University of Wellington, P.O. Box 600, Wellington (New Zealand)
2. Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6100 (United States)

The thermopower and resistivity of bulk superconducting HgBa[sub 2]Ca[sub 2]Cu[sub 3]O[sub 8+[delta]] (Hg-1223) have been measured for 15 samples (prepared from two batches) subjected to various annealing treatments in oxygen or nitrogen; all but two samples had values of zero-resistance [ital T][sub [ital c]] of approximately 134 K. In the normal state, the thermopower of the annealed samples shows a similar shape as a function of temperature: it decreases as temperature increases, with the rate of decrease slowing down at higher temperatures. The thermopower remains positive up to room temperature in all of our samples despite the high [ital T][sub [ital c]] values and annealing in oxygen, suggesting that the samples remain slightly underdoped.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7060871
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 51:2; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BARIUM OXIDES
THERMOELECTRICITY
CALCIUM OXIDES
COPPER OXIDES
MERCURY OXIDES
ANNEALING
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
ELECTRICITY
HEAT TREATMENTS
MERCURY COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
665411* - Basic Superconductivity Studies- (1992-)
360606 - Other Materials- Physical Properties- (1992-)