Hole concentration dependence of the magnetic moment in superconducting and insulating La2-xSrxCuO4 - art. no. 172501

Recent neutron-scattering measurements on the La2-xSrxCuO4 system have reve aled a drastic change of the incommensurate static-spin correlations from d iagonal in the insulating region to parallel in the superconducting region. We report the eloping dependence of the ordered magnetic moment for the ho le concentration region 0.03 less than or equal to x less than or equal to 0.12, focusing on the relationship between the static magnetism and the sup erconductivity. The elastic magnetic cross-section decreases monotonically with increasing x for 0.03 less than or equal to x less than or equal to 0. 07. We find that the ordered magnetic moment mu varies from similar to 0.18 mu (B)/Cu(x = 0.03) to similar to 0.06 mu (B)/Cu(x = 0.07). No significant anomaly is observed at the: insulator-superconductor boundary (x similar t o 0.055). The elastic magnetic cross-section is enhanced in the vicinity of x = 0.12 where resolution-limited width peaks are observed in neutron-scat tering measurements and where the apparent magnetic and superconducting tra nsitions coincide.