Abstract
The results of the Mössbauer study of ferrite AgFeO2 manifesting multiferroic properties (at T ≤ T N2) have been presented. The hyperfine interaction parameters of 57Fe nuclei have been analyzed in a wide temperature range including the points of two magnetic phase transitions (T N2 ≈ 7–9 K and T N1 ≈ 15–16 K). It has been shown that the Mössbauer spectra of the 57Fe nuclei are sensitive to the variations of the character of the magnetic ordering of Fe3+ ions in the studied ferrite. The results of the model identification of a series of spectra (4.7 K ≤ T ≤ T N2) under the assumption of the cycloid magnetic structure of ferrite AgFeO2 have been presented. The analysis of the results has been performed in comparison with the literature data for other oxide multiferroics.
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Original Russian Text © V.S. Rusakov, I.A. Presnyakov, A.V. Sobolev, A.M. Gapochka, M.E. Matsnev, A.A. Belik, 2013, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 98, No. 9, pp. 613–619.
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Rusakov, V.S., Presnyakov, I.A., Sobolev, A.V. et al. Spatially modulated magnetic structure of AgFeO2: Mössbauer study on 57Fe nuclei. Jetp Lett. 98, 544–550 (2014). https://doi.org/10.1134/S0021364013220098
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DOI: https://doi.org/10.1134/S0021364013220098