Mössbauer and X-ray diffraction study of Co2+–Si4+ substituted M-type barium hexaferrite BaFe12−2хСохSiхO19±γ

Using X-ray powder diffractions, Mössbauer spectroscopy, and magnetic measurements, the effect of dopants (Co2++Si4+) on the fine structure and magnetic properties of M-type barium hexaferrite prepared by hydroxide and carbonate precipitations has been studied. It has been shown that the magnetic pr...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 330; pp. 72 - 75
Main Authors Solovyova, E.D., Pashkova, E.V., Ivanitski, V.P., V′yunov, O.I., Belous, A.G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2013
Subjects
Barium hexaferrite
Magnetic structure
Mössbauer spectroscopy
Non-crystalline material
Precipitation
Non-crystalline material
Magnetic structure
Barium hexaferrite
Precipitation
Mössbauer spectroscopy
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Summary:Using X-ray powder diffractions, Mössbauer spectroscopy, and magnetic measurements, the effect of dopants (Co2++Si4+) on the fine structure and magnetic properties of M-type barium hexaferrite prepared by hydroxide and carbonate precipitations has been studied. It has been shown that the magnetic properties of M-type barium hexaferrite can be controlled by heterovalent substitution 2Fe3+→Со2++Sі4+. ► In the range х=0–0.3, homogeneous solid solutions BaFe12−2xCoxSixO19±γ are formed. ► Only Fe3+ions in the high-spin state present in the homogeneous region. ► Со2+, Sі4+ ions prefer to occupy crystallographic positions 12k, 4f1 respectively. ► Substitution 2Fe3+→Со2++Sі4+ decreases particle size and coercivity.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2012.10.035