Transport properties of the superconducting Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10}-DyBa{sub 2}SnO{sub 5.5} percolation system
- Council of Scientific and Industrial Research, Regional Research Laboraotory, Trivandrum 695019 (India)
Electrical transport properties and percolation behavior of superconducting Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10}-DyBa{sub 2}SnO{sub 5.5}, a superconductor-insulator composite system, have been studied by x-ray diffraction and temperature-resistivity measurements. Normal-state and superconducting percolation threshold values are found to be {similar_to}20 vol % of Bi(2223) in the composite. The values obtained for critical exponents describing the normal-state transport behavior of the system are matched with theoretically expected values for an idealized metal-insulator composite system. No detectable chemical reactivity was observed between Bi(2223) and the ceramic insulator DyBa{sub 2}SnO{sub 5.5}, even under severe heat treatment at 850 {degree}C. The implications are discussed.
- OSTI ID:
- 165120
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 51; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM OXIDES
BISMUTH OXIDES
CALCIUM OXIDES
CHEMICAL ACTIVATION
COMPOSITE MATERIALS
CUPRATES
DYSPROSIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL INSULATORS
HIGH-TC SUPERCONDUCTORS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TIN OXIDES
TRANSPORT THEORY
X-RAY DIFFRACTION