Zeitschrift für Physik B Condensed Matter

Internal magnetic fields in the high-temperature superconductor YBa2Cu3O7-δ from muon spin rotation experiments

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Muon spin rotation (μSR) measurements of the internal magnetic fields in sintered YBa2Cu3O7-δ samples are reported. Pronounced differences between field-cooled (FC) and zero-field-cooled (ZFC) μSR signals, hysteresis effects and flux trapping are observed. The μSR results are compared with the results of macroscopic experiments (susceptibility, magnetization, resistivity) and with predictions obtained from models of weakly-coupled superconducting regions. © 1988 Springer-Verlag.