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Mössbauer Spectroscopy in disordered magnetic systems: Clustering effects inAuFe reentrant ferromagnet

  • Applications of Hyperfine Interactions to Physics of Condensed Matter
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Abstract

Basic properties of magnetic reentrant systems are reported. The results obtained with Mössbauer Spectroscopy, are briefly reviewed and critically discussed. Particular emphasis is placed on the case of Au1-xFex (x>15%) reentrant ferromagnet. In the light of our experiments under external field, a model is proposed, describing the microscopic structure as an assembly of small weakly coupled superparamagnetic clusters. We believe that this short scale effect is not in disagreement with the existence of large ferromagnetic domains (≈=50μ) recently observed by electron transmission microscopy on similar reentrant alloys by Senoussiet al.

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  1. Laboratoire de Spectrométrie Physique, Université Joseph-Fourier/Grenoble I, B.P. 87, 38402, Saint-Martin d’Hères Cédex, France

    C. Meyer & F. Hartmann-Boutron

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  1. C. Meyer
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  2. F. Hartmann-Boutron
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Meyer, C., Hartmann-Boutron, F. Mössbauer Spectroscopy in disordered magnetic systems: Clustering effects inAuFe reentrant ferromagnet. Hyperfine Interact 59, 219–235 (1990). https://doi.org/10.1007/BF02401224

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