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Relation between magnetic hyperfine field distribution and cation order in natural hedenbergite

  • Magnetism, Hyperfine Fields — Non-Metals
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Abstract

Mössbauer and magnetic measurements have been performed at various temperatures between 1.5K and 300K on a natural hedenbergite Ca0.96 Mg0.19 Fe0.82Mn0.02Si2O6. The magnetic measurements are consistent with a ferromagnetic alignment of the Fe2+ moments inside each zig-zag M1 chain and antiferromagnetic alignment of the moments of neighbouring chains. Above TN (Mössbauer)=29±2K, a single quadrupole doublet attributed to Fe2+ in the M1 sites is observed. At 4.2K, the Mössbauer spectra can be accounted for by a discrete distribution of six hyperfine field components which can be related to all the possible Fe2+−Mg2+ configurations up to second cation neighbours surrounding a central57Fe2+ probe.

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Authors and Affiliations

  1. CEN-Grenoble, DRF/Service de Physique, 85X-F38041, Grenoble Cedex, France

    J. R. Regnard

  2. LEPES, CNRS, 166X-F38042, Grenoble Cedex, France

    M. Boujida

Authors
  1. J. R. Regnard
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  2. M. Boujida
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Regnard, J.R., Boujida, M. Relation between magnetic hyperfine field distribution and cation order in natural hedenbergite. Hyperfine Interact 41, 513–516 (1988). https://doi.org/10.1007/BF02400441

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  • DOI: https://doi.org/10.1007/BF02400441

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