Internal magnetic fields in the high-T_c superconductors La_1.8Sr_0.2CuO₄ and YBa₂Cu₃O_7-δ from muon spin rotation experiments

Abstract

Measurements of the internal magnetic field in the high-Tc superconductors La1.8Sr0.2CuO4 and YBa2Cu3O7-δ have been performed after zero-field cooling using the muon spin rotation (μSR) technique. Temperature-dependent changes are observed below Tc in both the magnitude of the internal field and the fraction of muons which experience this field. © 1987.