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Stoichiometry of LiNiO2 Studied by Mössbauer Spectroscopy |
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| Authors: | Ksenofontov V Reiman S Walcher D Garcia Y Doroshenko N Gütlich P |
| Institution: | (1) Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg Universität, Staudinger Weg 9, D-55099 Mainz, Germany;(2) A. A. Galkin Donetsk Physico-Technical Institute NAS of Ukraine, R. Luxemburg Str. 72, 340114 Donetsk, Ukraine |
| 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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