Evidence of current-noise hysteresis in superconducting YBa2Cu3O7−δ specimens in a magnetic field
M. Celasco, A. Masoero, P. Mazzetti, A. Stepanescu
DOI 10.1103/PhysRevB.44.5366 · Physical Review B
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Abstract
Current noise observed on YBa2Cu3O7−δ ceramic superconductors, brought to a resistive state by the application of a magnetic field, is shown to be very different in amplitude when the same resistance value is obtained by either increasing or decreasing the field. A tentative explanation of this hysteretic effect on current noise in terms of a model of superconducting islands separated by resistive, noise-generating boundaries, whose structure is hysteretically field dependent, is reported. The possibility of using the noise to get information on the internal structure of the ‘‘strong’’ and ‘‘weak’’ superconducting regions is suggested.
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. | 77.3 | Pressure not reported | unknown |
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