Abstract
A four-level relaxation model in the two-sublattice approximation has been proposed and implemented for the description of the Mössbauer spectra of ferrimagnetic nanoparticles under conditions of metamagnetism. This model is a basis for the further development of the theory of magnetic dynamics of ferrimagnetic nanoparticles and allows the qualitative description of the size effects, which for nearly half a century were observed repeatedly in the experimental absorption spectra of 57Fe nuclei in ferrimagnetic nanoparticles.
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Original Russian Text © M.A. Chuev, 2013, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 98, No. 8, pp. 523–528.
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Chuev, M.A. On the shape of gamma-resonance spectra of ferrimagnetic nanoparticles under conditions of metamagnetism. Jetp Lett. 98, 465–470 (2013). https://doi.org/10.1134/S0021364013210029
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DOI: https://doi.org/10.1134/S0021364013210029