Field-modulated microwave surface resistance in a single-crystal Tl2Ca2BaCu2O8 superconductor
N. H. Tea, M. B. Salamon, T. Datta, H. M. Duan, A. M. Hermann
DOI 10.1103/PhysRevB.45.5628 · Physical Review B
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Abstract
We report magnetic-field-modulated microwave surface resistance in a single-crystal Tl2Ca2BaCu2O8 superconductor. At a fixed temperature, as the applied magnetic field is varied, the observed signal has two features: an intense sharp peak at low field and a broad maximum at high field. The peak field defined for the broad maximum does not have the same temperature dependence as the irreversiblity line determined from dc magnetization measurement. The results are analyzed on the basis of recent theoretical models. It is found that the flux-flow resistivity ρf∝B for B<Bpeak and ρf=const for B>Bpeak. Scaling of the data at different T and B gives a universal function for the surface resistance.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ca2BaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 102 | Pressure not reported | onset |
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