Abstract
Measurements of the internal magnetic field in the high- T c superconductors La 1.8Sr 0.2CuO 4 and YBa 2Cu 3O 7−δ have been performed after zero-field cooling using the muon spin rotation (μSR) technique. Temperature-dependent changes are observed below T c in both the magnitude of the internal field and the fraction of muons which experience this field.
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