Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions in a magnetic field
A. Yurgens, D. Winkler, T. Claeson, G. Yang, I. F. G. Parker, C. E. Gough
DOI 10.1103/PhysRevB.59.7196 · Physical Review B
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Abstract
The normal and superconducting state c-axis transport properties of Bi2Sr2CaCu2O8 single crystals have been measured as a function of doping and magnetic fields parallel and perpendicular to the CuO2 planes, using mesa structures containing a small number of atomic unit-cell layers. For low current bias, the peak in the magnetic-field-dependent c-axis resistance is observed to scale approximately inversely with the zero-field critical current. The critical current Ic is strongly dependent on temperature and field B⊥ perpendicular to the CuO2 planes. This provides information on the magnetic phase diagram and the correlation of flux pancakes across adjacent pairs of superconducting CuO2 planes. Over an appreciable region of the phase diagram the critical current Ic(B⊥) varies ∼1/B⊥μ, with μ≈0.8 to 0.9. In a parallel field, Ic(B∥) varies as exp[−(B∥/B0)], with B0∼2T, consistent with a model involving pinned Josephson vortices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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