Temperature Mössbauer study of the spatial spin-modulated structure in the multiferroic BiFeO 3

57 Fe Mössbauer detailed study of the spatial spin-modulated structure of the multiferroic BiFeO 3 was carried out in a wide temperature range including the temperature of magnetic phase transition. The Mossbauer spectra have been analysed by fitting in terms of the anharmonic spin cycloid mode. It...

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Bibliographic Details
Published in:EPJ Web of conferences 2018, Vol.185, p.7010
Main Authors: Rusakov, Vyacheslav, Pokatilov, Vyacheslav, Sigov, Alexander, Matsnev, Mikhail, Pyatakov, Alexander
Format: Article
Language:English
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Summary:57 Fe Mössbauer detailed study of the spatial spin-modulated structure of the multiferroic BiFeO 3 was carried out in a wide temperature range including the temperature of magnetic phase transition. The Mossbauer spectra have been analysed by fitting in terms of the anharmonic spin cycloid mode. It is established that at temperatures below ~330 K a magnetic anisotropy of the "easy axis" type is realized and above is the magnetic anisotropy of the "easy plane" type. An explanation for the change in the type of magnetic anisotropy is proposed, based on taking into account the different temperature dependences of the two contributions to the effective uniaxial magnetic anisotropy constant: a crystal anisotropy of net antiferromagnet and a weak ferromagnetism.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/201818507010