Muon spin rotation evidence for a glassy superconducting state in YBa2Cu3O7-y |
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| Affiliation: | Dipartimento di Fisica, Università di Parma, I-43100 Parma, Italy;Istituto MASPEC, CNR, I-43100 Parma, Italy;Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK |
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| Abstract: | We report on muon spin rotation (μSR) measurements of the internal magnetization in polycrystalline samples of the high Tc superconductor YBa2Cu3O7-y. The mean value as well as the mean square deviation of the internal magnetic field seen by the muons undergo large variations with temperature. This effect shows a marked dependence on the magnetic history of the sample, which is what is expected of a glassy superconducting state. |
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