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57Fe Mössbauer spectra and magnetic data from the kagomé antiferromagnet H3O-jarosite

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Abstract

57Fe Mössbauer spectra are presented from (H3O)Fe3(SO4)2(OH)6 (or H3O-jarosite), which is a model kagomé antiferromagnet which features geometrical frustration and spin-glass-like behaviour. Dynamic scaling of the freezing temperature as a function of frequency is observed over a large frequency range, which indicates the presence of a spin-glass transition. A fast relaxation model between “up” and “down” states, separated by an energy gap, is presented to account for the shape of the Mössbauer spectra below the freezing temperature. From a calculation of the Electric Field Gradient tensor, it is suggested that H3O-jarosite is an XY-Heisenberg antiferromagnet, where the Fe3+ moments lie in the kagomé planes.

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Authors and Affiliations

  1. C.E.A.- Saclay, Service de Physique de l’Etat Condensé, URA 2464 (CNRS), 91191, Gif-sur-Yvette, France

    P. Bonville, V. Dupuis & E. Vincent

  2. Laboratoire des Liquides Ioniques et Interfaces Chargées, Université Pierre et Marie Curie, 75006, Paris, France

    V. Dupuis

  3. Laboratoire des Agrégats Moléculaires et Matériaux Inorganiques, UMR 5072 (CNRS), Université Montpellier II, 34095, Montpellier, France

    P. E. Lippens

  4. Department of Chemistry, University College London, 20 Gordon Street, London, WCIH 0AJ, UK

    A. S. Wills

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  1. P. Bonville
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  2. V. Dupuis
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  3. E. Vincent
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  4. P. E. Lippens
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  5. A. S. Wills
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Correspondence to P. Bonville.

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Bonville, P., Dupuis, V., Vincent, E. et al. 57Fe Mössbauer spectra and magnetic data from the kagomé antiferromagnet H3O-jarosite. Hyperfine Interact 168, 1085–1089 (2006). https://doi.org/10.1007/s10751-006-9441-z

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  • DOI: https://doi.org/10.1007/s10751-006-9441-z

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