Influence of alloying additions (Mo, Mn, Co) on the magnetic properties of FeSiB amorphous alloys

Abstract

In the present paper the magnetic permeability µ, magnetic after-effects ∆µ/µ, saturation magnetization µ 0 M S , Curie temperature T C , primary crystallization temperature T X1 and magnetostriction coefficients λ were examined for a group of amorphous alloys, i.e. Fe 80 Si 6 B 14 and Fe 75 XSi 6 B 14 (X = Mo 5 , Mo 2.5 Mn 2.5 , Mo 2.5 Co 2.5). It was shown that these alloying additions cause a decrease of the Curie temperature, saturation magnetization, magnetic permeability, magnetic after-effects and magnetostriction coefficients, and an increase of the primary crystallization temperature with respect to Fe 80 Si 6 B 14. The observed decrease of both magnetostriction coefficients-saturation magnetostriction and volume magnetostriction, is correlated with the decrease of the Curie temperature. Cobalt and manganese atoms influence the crystallization temperature in the same way as molybdenum, which means that the diffusion processes responsible for crystallization are not enough sensitive to this kind of alloying addition. Amorphous alloys / Magnetic properties / Magnetostriction Introduction