Temperature and doping-level dependence of magnetic order in La2-xSrxNiO4+delta studied by muon spin rotation

Journal article

We report muon-spin-rotation (μSR) measurements on a series of compounds with composition La2-xSrxNiO4+δ with strontium doping level x between 0 and 1. A magnetic transition is found in all the samples studied, which occurs at a composition-dependent temperature, TM. Below TM clear precession signals are observed in zero applied magnetic field for all x, indicating the existence of at least short-range magnetic order on a time scale longer than 10-8 s. Above TM the magnetic correlation times decrease by several orders of magnitude. At x≈0.33, we find peaks in both TM and the zero-temperature staggered magnetization, an observation which we attribute to the higher degree of localization of the holes at this doping level. The measurements of TM as a function of x extend the determination of Néel temperatures by previous neutron diffraction and μSR measurements. © 1999 The American Physical Society.

Authors: Jestadt, T; Chow, K; Blundell, S; Hayes, W; Pratt, F

• Publication status: Published
• Journal: Physical Review B
• Volume: 59
• Issue: 5
• Pages: 3775-3782
• Publication date: 1999-02-01
• DOI: 10.1103/PhysRevB.59.3775
• EISSN: 1095-3795
• ISSN: 1098-0121
• Language: English