Hole concentration dependence of the magnetic moment in superconducting and insulating La2−xSrxCuO4

S. Wakimoto; R. J. Birgeneau; Y. S. Lee; G. Shirane

doi:10.1103/PhysRevB.63.172501

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Hole concentration dependence of the magnetic moment in superconducting and insulating La2−xSrxCuO4

S. Wakimoto, R. J. Birgeneau, Y. S. Lee, G. Shirane

DOI 10.1103/PhysRevB.63.172501 · Physical Review B

T1

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Abstract

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 doping dependence of the ordered magnetic moment for the hole concentration region 0.03<~x<~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<~x<~0.07. We find that the ordered magnetic moment μ varies from ∼0.18μB/Cu(x=0.03) to ∼0.06μB/Cu(x=0.07). No significant anomaly is observed at the insulator-superconductor boundary (x∼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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown