Abstract
The main aim of the paper was to study the influence of 1 h annealing (temperature range 300<Ta<850 K) on magnetisation processes, the intensity of magnetic after-effect Δμ/μ (Ta) and magnetic permeability μ(Ta) determined at room temperature. The observed dependence of Δμ/μ (Ta) is in agreement with models proposed by Allia– Vinai and Kronmüller and can be related to processes of coagulation and disappearance of microvoids (the intensity of magnetic after-effect is proportional to the amount of microvoids). It has been shown that for the amorphous alloys of type FeCu1XSi13B9 (X=Mo, Cr, Zr) magnetic properties can be optimised by applying the well-defined thermal treatment causing a formation of nanocrystalline phase.
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