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 revealed a drastic change of the incommensurate static-spin correlations from diagonal in the insulating region to parallel in the superconducting region. We report the eloping dependence of the ordered magnetic moment for the hole 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 superconductivity. 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 to 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-scattering measurements and where the apparent magnetic and superconducting transitions coincide.