The effect of Ni content in amorphous soft magnetic Fe-Ni-Si-B alloys on the magnetic properties and efficiency of unsaturated magnetic field annealing

E.N. Tokmakova ORCID logo , V.Y. Vvedenskiy ORCID logo show affiliations and emails
Received 15 March 2024; Accepted 17 April 2024;
Citation: E.N. Tokmakova, V.Y. Vvedenskiy. The effect of Ni content in amorphous soft magnetic Fe-Ni-Si-B alloys on the magnetic properties and efficiency of unsaturated magnetic field annealing. Lett. Mater., 2024, 14(2) 130-135
BibTex   https://doi.org/10.48612/letters/2024-2-130-135

Abstract

Compared with traditional annealing without a field, unsaturated magnetic field annealing leads to a more significant improvement in the soft magnetic properties of an amorphous alloy with a higher Ni content.The effect of Ni content in amorphous Fe-Ni-Si-B alloys on the soft magnetic properties and the efficiency of annealing in unsaturated longitudinal magnetic field in terms of improvement magnetic softness have been studied. For Fe69Ni8Si9B14 and Fe77Ni1Si9B13 alloys, it is shown that by eliminating the effect of domain boundary stabilization, unsaturated magnetic field annealing without crystallization can be a more efficient treatment compared to annealing in the absence of a field. In addition, the greater efficiency of unsaturated magnetic field annealing in terms of reducing coercive force (up to 33 %) and increasing low-field permeability (up to 359 %) with a comparable effect of increasing the maximum permeability (by 139 %) is characteristic of the alloy with a higher Ni content. The differences in the effectiveness of the influence of annealing in unsaturated field on magnetic properties of alloys with different Ni content are associated with the difference in the processes of stress relaxation and inducing magnetic anisotropy due to directional ordering.

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