Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-667-C8-670
Structural Relaxation in Amorphous Alloys of Type FeSiBG. Haneczok, J. Rasek, Z. Stoklosa and B. Zegrodnik
Institut of Physics and Chemistry of Metals, Silesian University, 40-007 Katowice, Poland
The Irreversible component of the structural relaxation in two ferromagnetic amorphous alloys Fe78Si9B13 and Fe78Si13B9 was examined by making use of mechanical spectroscopy and isothermal time instability measurements of shear modulus G(t) and magnetic permeability µ(t). It was shown that the first stage of the structural relaxation, attributed to the rearrangements of anisotropic atom pairs Si/B 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 spectrum stretches between 1.2 - 1.7 eV).
© EDP Sciences 1996