Abstract
The hyperfine fieldsH f(T), center shifts δ(T) and relative recoilless fractionsf a(T) at different lattice sites of barium ferrite were determined by Mössbauer spectroscopy of57Fe over a temperature range from 12 to 723 K. For ferric iron in the crystalline site (2b), the recoilless fractionf a(T) decreases most with increasing temperature in comparison with that of other sites, corresponding to a characteristic temperature {ie219-1}. These results indicate that the ferric iron in the site (2b) oscillates between two equivalent positions (4e) on either side of the symmetry plane normal to thec-axis.
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Chen, Y.L., Li, X.D. & Xu, B.F. A Mössbauer study of the bipyramidal lattice site (2b) in BaFe12O19 . Hyperfine Interact 62, 219–224 (1990). https://doi.org/10.1007/BF02397701
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DOI: https://doi.org/10.1007/BF02397701