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Distribution of electric and magnetic hyperfine fields in Fe-rich gallo-germanates

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Abstract

The crystal field disorder in some tetragonal and trigonal Ca-gallo-germanates, i.e., A2Fe2ZO7 and A2LnFe3Ge3O14, with A = Ba or Sr, Ln = La or Nd and Z = Ge or Si, has been studied by 57Fe Mössbauer spectroscopy. The observed distribution of the hyperfine fields is analysed from a theoretical model based on the additive perturbation approximation of crystal fields, a rigid lattice of ionic point charges and the random substitution of Fe3+/Z4+ and A2+/Ln3+.

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  1. National Institute of Materials Physics, P.O. Box Mg-07, Bucharest, Romania

    S. Constantinescu

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  1. S. Constantinescu
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Constantinescu, S. Distribution of electric and magnetic hyperfine fields in Fe-rich gallo-germanates. Hyperfine Interact 168, 1121–1125 (2006). https://doi.org/10.1007/s10751-006-9480-5

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