Pair-breaking effect of high current densities on the superconducting transition in YBa2Cu3O7−δ
Milind N. Kunchur, David K. Christen, Charles E. Klabunde, Julia M. Phillips
DOI 10.1103/PhysRevLett.72.752 · Physical Review Letters
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Abstract
The equilibrium resistive transition of YBa2Cu3O7−δ epitaxial films was measured at high pulsed current densities J, to promote homogeneous current flow and free flux flow. The superconducting transition temperature Tc was then depressed as a function of J in fixed fields H. The shifts in Tc, defined near midtransition, scaled following Ginzburg-Landau behavior: ΔTc(H,J)/Tc(H,0)=[J/J0]2/3, where J0 is a field- and current-indpendent constant.
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. | — | Pressure not reported | midpoint |
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