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Microstructural variations as a function of δ in La2−xSrxNiO4+δ

  • M.J. Sayagués (a1), A. Caneiro (a2), J.M. González-Calbet (a1) and M. Vallet-Regí (a3)

Abstract

A microstructural characterization of the La2−xSrxNiO4+δ (0 ⋚ x ⋚ 1) system, prepared with accurate control of the oxygen content, has been performed. The electron diffraction study shows the evolution of the accommodation of compositional variations as a function of δ. For δ > 0.06, interstitial oxygens are ordered, leading to new K2NiF4 superstructural types. Samples with δ < 0.06 accommodate the nonstoichiometry by means of random distribution of anionic vacancies.

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Microstructural variations as a function of δ in La2−xSrxNiO4+δ

  • M.J. Sayagués (a1), A. Caneiro (a2), J.M. González-Calbet (a1) and M. Vallet-Regí (a3)

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