Vortex Phase Diagram of Bi2Sr2CaCu2O8−y near the Superconducting Transition
Y. M. Wan, S. E. Hebboul, J. C. Garland
DOI 10.1103/PhysRevLett.72.3867 · Physical Review Letters
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Abstract
Six-terminal measurements of the resistive transition of Bi2Sr2CaCu2O8−y crystals in a weak external magnetic field H∥c axis are analyzed to deduce the magnetic H−T phase diagram near the superconducting transition. We find evidence for two magnetic field boundaries, namely, a depinning field Hp(T) and a 3D-2D crossover field Hm(T)≥Hp(T), each of which intersects the H=0 axis at a temperature above the zero-field a−b plane transition temperature. We interpret the crossover field Hm(T) as marking the boundary between 3D vortex lines and interacting 2D vortices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88.5 | Pressure not reported | unknown |
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