Time evolution study of the domain structure in amorphous Fe64Co21B15 and Co77B23 using dynamic 3D-neutron depolarization
The most recent results on the relaxation of magnetic permeability in amorphous ferromagnets have been obtained using the ac technique. The magnetic relaxation is attributed to the existence of structural defects, which are typical for the amorphous metallic state. The short-time magnetic relaxation in amorphous Fe64Co21B15 and Co77B23 alloys was measured by the 3D-neutron depolarization technique after impulsive sample saturation. The behaviour of the magnetic decay shows that this effect has a predominant diffusive character, ascribed to the activated process of directional ordering of defects.