ac response of Hg-based superconductors: Surface barrier and bulk pinning contributions
L. Fàbrega, A. Sin, A. Calleja, J. Fontcuberta
DOI 10.1103/PhysRevB.61.9793 · Physical Review B
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Abstract
A complete study of the ac response of Hg-based superconductors with 1, 2, and 3 Cu-O planes is presented. Under a dc field, the ac susceptibility χac(T) displays a double transition, which is argued to be of intrinsic nature. The systematic analysis of the evolution of χac (fundamental and higher harmonics) as a function of the experimental parameters, and the comparison with resistance and dc magnetization measurements, suggest that the higher temperature transition is ascribed to magnetic irreversibility due to surface barriers; the lower temperature transition is associated to bulk pinning.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 97 | Pressure not reported | onset |
| Hg0.82Re0.18Sr2CaCu2O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 107 | Pressure not reported | onset |
| Hg0.82Re0.18Ba2Ca2Cu3O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 133 | Pressure not reported | onset |
| HgBa2Ca2Cu3O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 134 | Pressure not reported | unknown |
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