Non-Ohmic dissipative regime in the superconducting transition of polycrystalline Y1Ba2Cu3Ox
M. A. Dubson, S. T. Herbert, J. J. Calabrese, D. C. Harris, B. R. Patton, J. C. Garland
DOI 10.1103/PhysRevLett.60.1061 · Physical Review Letters
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Abstract
We have measured the low-field magnetoresistance and current-voltage characteristics of polycrystalline Y1Ba2Cu3O7−δ near the superconducting-normal transition. The development of a fully superconducting state occurs via an intermediate phase about 2 K in width. Within this intermediate phase, sample dissipation is highly non-Ohmic and exhibits extreme sensitivity to small magnetic fields. The nonlinear I-V characteristics describe a new phase with zero resistance and zero critical current which seems to arise from the presence of strong junction disorder.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.3 | Pressure not reported | onset |
| Y1Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.8 | Pressure not reported | zero_resistance |
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