Abstract
Results of Mössbauer investigations on 57Fe nuclei in multiferroic material Bi57Fe0.10Fe0.85Cr0.05O3 in the temperature range from 5.2 to 300 K are presented. Bulk rhombohedral samples were obtained by solidstate synthesis at high pressure. Mössbauer spectra were analyzed using the model of spatial incommensurate spin-modulated structure of the cycloidal type. Information on the influence of substituting Cr cations for Fe cations on hyperfine spectral parameters was obtained: the shift and quadrupolar shift of a Mössbauer line, and isotropic and anisotropic contributions into the hyperfine magnetic field. The anharmonicity parameter m of the spatial spin-modulated structure increases almost 1.7 times at 5.2 K when BiFeO3 is doped with chromium. The data on m were used for calculation of the uniaxial magnetic anisotropy constants and their temperature dependences for pure and chromium-doped BiFeO3.
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Original Russian Text © V.S. Pokatilov, V.S. Rusakov, A.S. Sigov, A.A. Belik, M.E. Matsnev, A.E. Komarov, 2017, published in Fizika Tverdogo Tela, 2017, Vol. 59, No. 3, pp. 433–439.
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Pokatilov, V.S., Rusakov, V.S., Sigov, A.S. et al. Mössbauer studies of spatial spin-modulated structure and hyperfine interactions in multiferroic Bi57Fe0.10Fe0.85Cr0.05O3 . Phys. Solid State 59, 443–449 (2017). https://doi.org/10.1134/S1063783417030271
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DOI: https://doi.org/10.1134/S1063783417030271