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NMR study of solid state reaction in Co-Sn multilayers

  • Low Dimensional Magnets and Surfaces
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Abstract

Amorphization by solid state reaction at room temperature in Co-Sn multilayers with periodicities of 65, 130 and 195 Å and relative Co to Sn ratio varying as 4, 3, 2 has been studied by zero field NMR method. The distribution of59Co hyperfine fields and that of NMR enhancement factors were used as a probe of the ferromagnetic part of a sample and its evolution with the annealing time. The critical role of the interface during the first hours of annealing is pointed out. On the long time scale the diffusion process is slowed down by the creation of Kirkendall voids and after 3 months of annealing some crystalline Co is still present.

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Jędryka, E., Panissod, P., Guilmin, P. et al. NMR study of solid state reaction in Co-Sn multilayers. Hyperfine Interact 51, 1103–1110 (1989). https://doi.org/10.1007/BF02407835

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