Nontrivial Shapes of the Mössbauer Spectra
of Magnetic Nanoparticles with Different Forms
of Magnetic Anisotropy

M. A. Chuev; Чуев М. А.

doi:10.31857/S0015323022601453

Nontrivial Shapes of the Mössbauer Spectra of Magnetic Nanoparticles with Different Forms of Magnetic Anisotropy

Authors: Chuev M.A.¹
Affiliations:
1. Valiev Institute of Physics and Technology, Russian Academy of Sciences
Issue: Vol 124, No 1 (2023)
Pages: 29-35
Section: ЭЛЕКТРИЧЕСКИЕ И МАГНИТНЫЕ СВОЙСТВА
URL: https://ruspoj.com/0015-3230/article/view/662744
DOI: https://doi.org/10.31857/S0015323022601453
EDN: https://elibrary.ru/KRCTYP
ID: 662744

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Abstract

The continual and quantum-mechanical models of magnetic dynamics are considered for a system of ferromagnetic nanoparticles with different forms of magnetic anisotropy alongside with the corresponding theory for describing the Mössbauer spectra of such materials. The calculations of spectra in these models demonstrate various forms of the magnetic hyperfine structure upon the evolution of the absorption spectra of nanoparticles from a well-resolved magnetic hyperfine structure (sextet of lines for 57Fe nuclei) at low tem-peratures to a single line or a five-stage pedestal at high temperatures. These models substantially broaden the methodological basis for the diagnostics of magnetic nanomaterials by the method of Mössbauer spec-troscopy.

Keywords

magnetic nanoparticles, magnetic anisotropy, magnetic dynamics, Mössbauer spectroscopy

About the authors

M. A. Chuev

Valiev Institute of Physics and Technology, Russian Academy of Sciences

Author for correspondence.
Email: m_a_chuev@mail.ru
Moscow, 117218 Russia

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