Transport properties of the superconducting Bi2Sr2Ca2Cu3O10-DyBa2SnO5.5 percolation system
J. Koshy, K. S. Kumar, J. Kurian, Y. P. Yadava, A. D. Damodaran
DOI 10.1103/PhysRevB.51.9096 · Physical Review B
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Abstract
Electrical transport properties and percolation behavior of superconducting Bi2Sr2Ca2Cu3O10-DyBa2SnO5.5, 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 ∼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 DyBa2SnO5.5, even under severe heat treatment at 850 °C. The implications are discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.5Pb0.5Sr2Ca2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | Pressure unresolved | zero_resistance |
| Bi2Sr2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | Pressure unresolved | zero_resistance |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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