M. Miglierini et al., FE-57 MOSSBAUER STUDY OF AMORPHOUS AND NANOCRYSTALLINE FE73.5NB3CU1SI13.5B9 AFTER NEUTRON-IRRADIATION, Hyperfine interactions, 84(1-4), 1994, pp. 295-299
Fe-57 Mossbauer spectroscopy is used to study neutron irradiation indu
ced changes in the short-range order of Fe73.5Nb3Cu1Si13.5B9 alloy. Th
e samples are investigated in both amorphous and nanocrystalline state
s. Neutron irradiation leads to an increase of the standard deviation
of a hyperfine field distribution (HFD), implying rearrangement of the
atoms towards disordering. Simultaneously, changes in the average val
ue of the hyperfine field and a net magnetic moment position occur as
a consequence of a spin reorientation, atom mixing and microscopic str
ess centres which are introduced by neutron irradiation.