The stress components effect on the Fe-based microwires magnetostatic and magnetostrictive properties

Abstract For glass-coated amorphous ferromagnetic Fe-based microwires both joint and separate effect of metallic nucleus diameter, d , and the ratio of metallic nucleus diameter to the total diameter of microwire in glass shell, d/D , on magnetic properties is investigated. Thereby the contribution of both shell-induced stresses, associated with the ratio of diameters, and internal nucleus stresses (residual, quenching), associated with the diameter of the nucleus are estimated. A strong and non-monotonic effect of the metallic nucleus diameter and metallic nucleus diameter/total microwire diameter ratio on magnetostatic and magnetostrictive properties was established. For analysis, we considered magnetically bi-stable microwires of “classic” Fe 77.5 Si 7.5 B 15 alloy with positive magnetostriction coefficient.