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

Journal Article · · Physical Review, B: Condensed Matter; (United States)
 [1];  [2];  [1]
  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)
+ Show Author Affiliations

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), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:2; ISSN PRBMDO; ISSN 0163-1829
Country of Publication:
United States
Language:
English

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Related Subjects

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