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Asymmetric doublet in Mössbauer spectra of superparamagnetic goethite

  • Relaxation Phase Transitions Lattice Dynamics
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Abstract

The broadening of the Mössbauer lines of microcrystalline goethite above the superferromagnetic transition temperature has been analyzed. The results show that the temperature dependence of the relaxation time is in accordance with the Vogel-Fulcher law. This indicates that the magnetic interaction among the crystallites is significant, in accordance with the results of previous studies at lower temperatures.

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Authors and Affiliations

  1. Laboratory of Applied Physics II, Technical University of Denmark, DK-2800, Lyngby, Denmark

    Morten Bo Madsen & Steen Mørup

  2. Laboratory of Clay Mineralogy, Geological Survey of Denmark, DK-2400, Copenhagen NV, Denmark

    Christian J. W. Koch

Authors
  1. Morten Bo Madsen
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  2. Steen Mørup
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  3. Christian J. W. Koch
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Madsen, M.B., Mørup, S. & Koch, C.J.W. Asymmetric doublet in Mössbauer spectra of superparamagnetic goethite. Hyperfine Interact 42, 1059–1062 (1988). https://doi.org/10.1007/BF02395573

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  • DOI: https://doi.org/10.1007/BF02395573

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