Fluctuation diamagnetism around the superconducting transition in a cuprate crystal with a reduced Meissner fraction
Jesús Mosqueira, Félix Vidal
DOI 10.1103/PhysRevB.77.052507 · Physical Review B
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Abstract
The magnetization around the superconducting transition was measured in a Tl0.5Pb0.5Sr2CaCu2O7 crystal affected by a considerable reduction (∼55%) of its effective superconducting volume fraction but still with a relatively sharp low-field Meissner transition, a behavior that may be attributed to the presence of structural inhomogeneities. By taking into account these inhomogeneities just through the Meissner fraction, the observed diamagnetism may still be explained, consistently above and below the superconducting transition, in terms of the conventional Ginzburg-Landau approach with fluctuations of Cooper pairs and vortices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl0.5Pb0.5Sr2CaCu2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 77.1 | Pressure not reported | midpoint |
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