Structural Relaxation in Amorphous Alloys of Type

The Irreversible component of the structural relaxation in two ferromagnetic amorphous alloys Fe,, Si, B,, and Fe,,Si,,B, was examined by making use of mechanical spectroscopy aud isothermal time instability measurements of shear modulus G(t) and magnetic permeability &). It was shown that the first stage of the structural relaxation, attributed to the rearrangements of anisotropic atom pairs SUB in the vicinity of free volumes takes place in the temperature range 300-500K with the mean activation energy E=0.9 eV (the spectrum stretches between 0.6-1.2 eV). The second stage annealing out of free volumes takes place in the temperature range 500-700 K with E=1.4 eV (the spectnun stretches between 1.2 1.7 eV).