Electronic state of ⁵⁷Fe probe atoms in perovskite-type Ni(III) and Cu(III) oxides

Igor A. Presniakov (1) , Viyacheslav S. Rusakov (1) , Alexey V. Sobolev (1) , Gérard Demazeau (2) , M. E. Matsnev (1) , Tatyana V. Gubaidulina (1) , Alexey Baranov (1)

1 Moscow State University
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

A comparative study of the electronic state of ⁵⁷Fe probe atoms in nickelates and cuprates LaM _0.99 ⁵⁷Fe_0.01O₃ and LaSrM _0.99 ⁵⁷Fe_0.01O₄ (M = Ni, Cu) was performed by Mössbauer spectroscopy. It was shown that the valence states of the probe atoms in these matrices differ considerably. The iron atoms in both nickelates are in one of their conventional valence states (Fe³⁺), while the hyperfine interaction parameters in the cuprates correspond to iron atoms in a formal oxidation state of +4. The differences observed in the valence states of the probe ⁵⁷Fe atoms are due to the different electronic configurations of Ni and Cu atoms in the oxides under consideration.

Domaines: Matériaux

Igor A. Presniakov, Viyacheslav S. Rusakov, Alexey V. Sobolev, Gérard Demazeau, M. E. Matsnev, et al.. Electronic state of ⁵⁷Fe probe atoms in perovskite-type Ni(III) and Cu(III) oxides. Bulletin of the Russian Academy of Sciences - Physics, 2010, 74 (3), pp.384-388. ⟨10.3103/S1062873810030214⟩. ⟨hal-00551891⟩