Fluctuation of vortices in single-crystal Tl2Ba2CuO6 superconductors
F. Zuo, D. Vacaru, H. M. Duan, A. M. Hermann
DOI 10.1103/PhysRevB.47.8327 · Physical Review B
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Abstract
We report magnetization studies on single crystals of Tl2Ba2CuO6 superconductors. For magnetic fields parallel to the c-axis configuration, fluctuations of vortices are observed in this layered compound. The characteristic temperature T* where M is independent of applied field is about 84.2 K. Low-field magnetization measurements show Hc1=0 at Ts=86.5 K while the mean-field transition temperature Tc0=88.8 K. The experimental results strongly suggest the Tl compound is Josephson-coupled between superconducting layers, and the spontaneous excitations are thus the wandering vortex lines rather than pancakes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88.8 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88.3 | Pressure not reported | onset |
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