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Stoichiometry of LiNiO2 Studied by Mössbauer Spectroscopy

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Abstract

From the 61Ni and 57Fe Mössbauer spectroscopy data follows the cationic site assignment in Li1−x Ni1+x O2. Our data explain the ferromagnetic properties of this material because of the appearance of Ni2+ (S=1) among Ni3+ (S=1/2) in Ni3+O2 hexagonal planes. We have no evidence for the ferromagnetic interaction between the NiO2 layers through the excess Ni2+ ions substituting the Li+ ions. The presence of Ni2+ found in the Ni3+O2 planes explains the absence of the Jahn–Teller distortions probably because of the electronic transfer between the Ni3+ and Ni2+ ions.

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Authors and Affiliations

  1. Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg Universität, Staudinger Weg 9, D-55099, Mainz, Germany

    V. Ksenofontov, S. Reiman, D. Walcher, Y. Garcia & P. Gütlich

  2. A. A. Galkin Donetsk Physico-Technical Institute NAS of Ukraine, R. Luxemburg Str. 72, 340114, Donetsk, Ukraine

    N. Doroshenko

Authors
  1. V. Ksenofontov
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  2. S. Reiman
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  3. D. Walcher
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  4. Y. Garcia
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  5. N. Doroshenko
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  6. P. Gütlich
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Ksenofontov, V., Reiman, S., Walcher, D. et al. Stoichiometry of LiNiO2 Studied by Mössbauer Spectroscopy. Hyperfine Interactions 139, 107–112 (2002). https://doi.org/10.1023/A:1021271321658

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