Kinetic paths for B2 order in nanocrystalline FeCo–Mo: a MÖssbauer spectroscopic study Original Research Article

The kinetic evolution of B2 order in nanocrystalline FeCo–Mo alloys was studied at different temperatures using Mössbauer spectroscopy. The kinetic paths in the space spanned by the two short-range order parameters αCo/Fe and αMo/Fe were found to be independent of temperature within experimental errors. This behavior is to be compared with that observed in coarse-grained FeCo–Mo alloys, where the paths were not the same at different temperatures. This can be attributed to the presence of more grain boundary regions in the nanophase alloys, which provide short-circuited diffusion paths for atom movements.