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A search for moment localisation in UMn2

  • Session 2. Magnetism
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Abstract

μSR, high resolution neutron powder diffraction and heat capacity have been used to study the spin fluctuation compound UMn2. The μSR spectra are dominated by muon depolarisation due to static fields from the Mn nuclei, features in the temperature dependence of the associated relaxation rate, σ, correlating well with the structural transitions observed at 210K. While a weak exponential relaxation (λ ∼ 0.01μs−1) indicates the presence of atomic spin fluctuations between 50K and 325K, μSR provides little evidence of moment localisation or long range magnetic order, although an anomalous increase in σ below 40K is observed.

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Author notes

  1. S. H. Kilcoyne

    Present address: Rutherford Appleton Laboratory, OX11 0QX, Chilton, UK

Authors and Affiliations

  1. J J Thomson Physical Laboratory, University of Reading, RG6 2AF, Reading, UK

    R. Cywinski & S. H. Kilcoyne

  2. Institut fur Experimentalphysik, Technische Universitat Wien, A-1040, Wien, Austria

    T. Holubar & G. Hilscher

Authors
  1. R. Cywinski
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  2. S. H. Kilcoyne
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  3. T. Holubar
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  4. G. Hilscher
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Cywinski, R., Kilcoyne, S.H., Holubar, T. et al. A search for moment localisation in UMn2 . Hyperfine Interact 85, 221–226 (1994). https://doi.org/10.1007/BF02069425

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