Medium range structure of amorphous Fe ₄₄Ni ₃₆B ₂₀-alloys by means of neutron-scattering at small momentum transfer

(Received 19 November 1991, accepted in final form 27 January 1992)

Abstract
The medium range structure of amorphous Fe ₄₄Ni ₃₆B ₂₀-alloys was investigated using neutron small angle scattering with isotopic substitution and immersion technique. The bulk material contains density fluctuations but no concentration fluctuations. In addition, surface scattering is caused by surface roughness. The regions with different densities within the bulk as well as on the surface are separated by smooth boundaries. The structure of the bulk is the same with all three melt spun specimens, whereas the surface apparently differs from specimen to specimen.