Observation of magnetic flux generated spontaneously during a rapid quench of superconducting films |
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Authors: | Maniv A Polturak E Koren G |
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Institution: | Physics Department, Technion-Israel Institute of Technology, Haifa 32000, Israel. |
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Abstract: | We report observations of spontaneous formation of magnetic flux lines during a rapid quench of YBa(2)Cu(3)O(7-delta) films through T(c). 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 >10(8) K/s. The amount of spontaneous flux increases weakly with the cooling rate. |
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