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Effect of Non-Stoichiometry Oxygen Content on the Magnetization of La1.5Sr0.5NiO4+δ

Abstract

We report on magnetization measurements of La1.5Sr0.5NiO4+δ for δ=0.01 and δ=−0.01. Zero field-cooled and field-cooled bulk magnetization measurements were performed parallel to the Ni–O planes of single crystals, and on a polycrystalline δ=0.01 sample. Striking differences in the magnetization curves are observed between the two doping levels that are identifiable in polycrystalline δ=0.01. The bulk magnetization differences indicate a crossover in the magnetic properties of La2−x Sr x NiO4+δ at half doping level, which can be used as a simple non-destructive way to determine whether La1.5Sr0.5NiO4+δ is under or over half doping.

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Correspondence to P. G. Freeman.

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Freeman, P.G., Giblin, S.R. & Prabhakaran, D. Effect of Non-Stoichiometry Oxygen Content on the Magnetization of La1.5Sr0.5NiO4+δ . J Supercond Nov Magn 24, 1149–1152 (2011). https://doi.org/10.1007/s10948-010-1098-9

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  • DOI: https://doi.org/10.1007/s10948-010-1098-9

Keywords

  • Charge order
  • La2−x Sr x NiO4+δ
  • La1.5Sr0.5NiO4
  • Dielectric
  • Permittivity