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

T Jestädt, K H Chow, S J Blundell, W Hayes, F L Pratt, Brendon W Lovett, M A Green, J E Millburn, M J Rosseinsky

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Abstract

We report muon-spin-rotation (mu SR) measurements on a series of compounds with composition La2-xSrxNiO4+delta 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, T-M. Below T-M 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 T-M the magnetic correlation times decrease by several orders of magnitude. At x approximate to 0.33, we find peaks in both T-M 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 T-M as a function of x extend the determination of Neel temperatures by previous neutron diffraction and mu SR measurements. [S0163-1829(99)09505-3].

Original languageEnglish
Pages (from-to)3775-3782
Number of pages8
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume59
Issue number5
DOIs
Publication statusPublished - Feb 1999

Cite this

Jestädt, T., Chow, K. H., Blundell, S. J., Hayes, W., Pratt, F. L., Lovett, B. W., Green, M. A., Millburn, J. E., & Rosseinsky, M. J. (1999). Temperature and doping-level dependence of magnetic order in La2-xSrxNiO4+δ studied by muon spin rotation. Physical Review B: Condensed Matter and Materials Physics, 59(5), 3775-3782. https://doi.org/10.1103/PhysRevB.59.3775