Low-field dependence of the microwave absorption in superconducting YBa2Cu3O7−x near Tc
R. Karim, S. A. Oliver, C. Vittoria, A. Widom, G. Balestrino, S. Barbanera, P. Paroli
DOI 10.1103/PhysRevB.39.797 · Physical Review B
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Abstract
Novel microwave absorption and dispersion measurements have been performed on polycrystalline samples and well-characterized single-crystal platelets of high-Tc superconductors YBa2Cu3O7−x. The results are explained in terms of fluxoids and rapid variation of the penetration depth near and below Tc. The microwave absorption increases as a function of the magnetic field as a result of increase in the surface area of the normal-conducting region. By applying a modulating field in a particular manner and from thermodynamic considerations there are strong indications of energy absorption by fluxoids.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | onset |
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | onset |
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