A search for moment localisation in UMn2 |
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| Authors: | R Cywinski S H Kilcoyne T Holubar G Hilscher |
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| Institution: | (1) J J Thomson Physical Laboratory, University of Reading, RG6 2AF Reading, UK;(2) Institut fur Experimentalphysik, Technische Universitat Wien, A-1040 Wien, Austria;(3) Present address: Rutherford Appleton Laboratory, OX11 0QX Chilton, UK |
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| Abstract: |  SR, high resolution neutron powder diffraction and heat capacity have been used to study the spin fluctuation compound UMn2. The SR spectra are dominated by muon depolarisation due to static fields from the Mn nuclei, features in the temperature dependence of the associated relaxation rate,  , correlating well with the structural transitions observed at 210K. While a weak exponential relaxation (  0.01s–1) indicates the presence of atomic spin fluctuations between 50K and 325K, SR provides little evidence of moment localisation or long range magnetic order, although an anomalous increase in below 40K is observed. |
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