Effect of superimposed electrical and thermal gradients in superconducting polycrystalline Bi-Pb-Sr-Ca-Cu-O
Richard A. Doyle, Vladimir V. Gridin
DOI 10.1103/PhysRevB.45.10797 · Physical Review B
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Abstract
We have studied thermoelectric effects in the presence of a superimposed transport current on a bar-shaped sample of polycrystalline Bi-Pb-Sr-Ca-Cu-O material with a superconducting transition at ≃109 K. The electrical current Iex was applied parallel and then antiparallel to the temperature gradient ∇xT, which was directed along the longest sample axis X. We have detected asymmetry in the temperature dependence of the longitudinal voltage drop as a result of the current direction with respect to ∇xT. The result is interpreted in terms of the recently reported observation of the analog of the Fountain effect in an Y-Ba-Cu-O film [Europhys. Lett. 13, 175 (1990)]. Our study supports the importance of weak-link-related effects in the thermoelectricity of high-Tc cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.6Pb0.4Sr2Ca2Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 109 | Pressure not reported | onset |
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