Abstract
We report the nuclear orientation of near-stoichiometric samples of ZrZn2 containing trace impurities of radioactive54Mn and60Co in the temperature range 6.5–60 mK and in applied fields between 0.2 and 5.7 T. Analysis of the resullts indicates that in both cases, the transition-element impurities occupy two sites (the Zr and Zn sites) with about equal probablities. In one site, most probably that of Zr, both impurities have positive hyperfine fields of +12.0 T and +3.8 T for Mn and Co, respectively; in the other site, the corresponding hyperfine fields are negative, with the values −6.0 T and −6.9 T. The dynamic hyperfine interaction of Mn in ZrZn2 has also been studied using the thermal cyclic method with a weak thermal link, and was analyzed for the two relaxation times corresponding to the different lattice sites.
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Hoffmann, M., Böttcher, M. & Brewer, W.D. Static and dynamic hyperfine interactions of Mn and Co impurities in the weak ferromagnet ZrZn2 . Hyperfine Interact 51, 861–867 (1989). https://doi.org/10.1007/BF02407793
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DOI: https://doi.org/10.1007/BF02407793