Normal-superconducting transition induced by high current densities in YBa2Cu3O7−δ melt-textured samples and thin films: Similarities and differences
M. T. González, J. Viña, S. R. Currás, J. A. Veira, J. Maza, F. Vidal
DOI 10.1103/PhysRevB.68.054514 · Physical Review B
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Abstract
Current-voltage characteristics of top-seeded melt-textured YBa2Cu3O7−δ are presented. The samples were cut out of centimetric monoliths. Films characteristics were also measured on microbridges patterned on thin films grown by dc sputtering. For both types of samples, a quasidiscontinuity or quenching was observed for a current density J* several times the critical current density Jc. Though films and bulks differ much in their magnitude of both Jc and J*, a proposal is made as to a common intrinsic origin of the quenching phenomenon. The unique temperature dependence observed for the ratio J*/Jc, as well as the explanation of the prequenching regime in terms of a single dissipation model, lends support to our proposal.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| 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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