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Cation distribution in natural ferrites

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Abstract

Mössbauer spectra of jacobsite have been recorded at temperatures of 4.2, 125, 180, 240 and 300 K and with an external magnetic field of 60 kOe applied parallel to the incident radiation at 4.2 K. The results show the presence of two different magnetic hyperfine interactions associated with the iron nuclei. Spectra of samples in external magnetic fields indicate the same sign for the magnetic hyperfine interactions, implying that both iron ions occupy only the octahedral sublattice. These results are compared with data from synthetic stoichiometry manganese ferrite, and a model of cation distribution, assuming the existence of vacancies, is proposed. According to this model, the mineral jacobsite is rich in manganese compared with stoichiometric MnFe2O4 ferrite.

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Authors and Affiliations

  1. Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, 60.450, Fortaleza, CE-Brazil

    H. A. Maia, F. F. T. De Araújo, M. A. B. De Araújo, J. Danon & R. B. Frankel

  2. Centro Brasileiro de Pesquisas Físicas, 22.290, Rio de Janeiro, Brazil

    J. Danon

  3. Physics Department, California Polytechnic State University, 93407, San Luis Obispo, CA, USA

    R. B. Frankel

Authors
  1. H. A. Maia
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  2. F. F. T. De Araújo
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  3. M. A. B. De Araújo
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  4. J. Danon
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  5. R. B. Frankel
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Additional information

This paper is dedicated to the memory of Professor Jacques Danon, who was the pioneer of Mössbauer spectroscopy in Brazil.

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Maia, H.A., De Araújo, F.F.T., De Araújo, M.A.B. et al. Cation distribution in natural ferrites. Hyperfine Interact 77, 43–50 (1993). https://doi.org/10.1007/BF02320297

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  • DOI: https://doi.org/10.1007/BF02320297

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