Observation of Magnetic Flux Generated Spontaneously During a Rapid Quench of Superconducting Films
A. Maniv, E. Polturak, G. Koren
DOI 10.1103/PhysRevLett.91.197001 · Physical Review Letters
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Abstract
We report observations of spontaneous formation of magnetic flux lines during a rapid quench of YBa2Cu3O7−δ films through Tc. This effect is predicted according to the Kibble-Zurek mechanism of creation of topological defects of the order parameter during a symmetry-breaking phase transition. Our previous experiment, at a quench rate of 20 K/s, gave null results. In the present experiment, the quench rate was increased to >108 K/s. The amount of spontaneous flux increases weakly with the cooling rate.
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 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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