Magneto-crystalline properties of BaFe12−2xMxSnxO19 (M = Sn, Ni, Zn) ferrite powders

BaFe12−2xMxSnxO19 compounds, where M = Sn2+, Ni2+ or Zn2+ ions, were synthesized by mechanical milling and partially by citrate precursor methods. Analysis of magneto-crystalline structure has been carried out by Mössbauer spectroscopy. The Sn4+ ions replace Fe3+ ions on 2b and slightly on 2a + 4f1...

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Bibliographic Details
Published in:Hyperfine interactions 2006-04, Vol.169 (1-3), p.1223-1230
Main Authors: Grusková, A, Lipka, J, Sláma, J, Jančárik, V, Papánová, M, Štofka, M, González, A, Mendoza, G
Format: Article
Language:English
Subjects:
Chemical synthesis
Coercivity
Crystal structure
Crystallinity
Curie temperature
Magnetic measurement
Magnetic properties
Mechanical milling
Mossbauer spectroscopy
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Summary:BaFe12−2xMxSnxO19 compounds, where M = Sn2+, Ni2+ or Zn2+ ions, were synthesized by mechanical milling and partially by citrate precursor methods. Analysis of magneto-crystalline structure has been carried out by Mössbauer spectroscopy. The Sn4+ ions replace Fe3+ ions on 2b and slightly on 2a + 4f1 sites, Zn2+ ions strongly prefer 4f1 sites, Sn2+ ions prefer 4f1 sites too and Ni2+ ions occupy 4f2 and 12k or 2a sites. The magnetic properties were evaluated by the vibrating sample magnetometry and the thermomagnetic analysis. A large variation of the intrinsic coercivity Hc (330 to 78 kA/m) and of temperature coefficient of coercivity of ΔHc /Δϑ (0.39 to 0.22 kA/m°C) were achieved as a function of the (Zn–Sn) and (Sn–Sn) substitutions, respectively. The Curie temperature Tc decreased with the (Ni–Sn) substitution from 447 to 399°C.
ISSN:0304-3843
1572-9540
DOI:10.1007/s10751-006-9428-9