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

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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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Author notes

  1. A. Caneiro

    Present address: Permanent address: Centra Atomico Bariloche, 8400 SC, Bariloche, Argentina

Authors and Affiliations

  1. Instituto de Magnetismo Aplicado, Apdo. 155, 28230, Madrid, Spain

    M. J. Sayagués, A. Caneiro, J. M. González-Calbet & M. Vallet-Regí

  2. Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense, 28040, Madrid, Spain

    M. J. Sayagués, J. M. González-Calbet & M. Vallet-Regí

Authors
  1. M. J. Sayagués
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  2. A. Caneiro
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  3. J. M. González-Calbet
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  4. M. Vallet-Regí
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Sayagués, M.J., Caneiro, A., González-Calbet, J.M. et al. Microstructural variations as a function of δ in La2−xSrxNiO4+δ. Journal of Materials Research 9, 1263–1271 (1994). https://doi.org/10.1557/JMR.1994.1263

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  • DOI: https://doi.org/10.1557/JMR.1994.1263

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