Issues $\rightarrow$ Volume 27, Issue 2 (2026)

Amorphous Alloys as a Promising Class of Functional Materials. Pt. 2. Magnetic Properties, Magnetic Anisotropy, and Disaccommodation

KYRYLCHUK V.V.$^1$, NOSENKO V.K.$^1$, BAITALYUK B.S.$^1$, YEVLASH I.K.$^1$, NOSENKO A.V.$^1$, IAKOVLEV V.E.$^1$, NIZAMEYEV M.S.$^1$, and DEKHTYARENKO V.A.$^{1,2}$

$^1$G.V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^2$E.O. Paton Electric Welding Institute of the N.A.S. of Ukraine, 11 Kazymyr Malevych Str., UA-03150 Kyiv, Ukraine

Received / final version: 02.03.2026 / 02.06.2026 Download PDF logo PDF

Abstract
This work is concerned with a well-known class of functional materials, namely, ribbon amorphous metal alloys based on Fe and Co. Their magnetic properties are analysed, in particular, the features of the formation of magnetic anisotropy, the phenomena of magnetic after-effects (disaccommodation), as well as the influence of thermal and thermomagnetic treatments on them. The physical nature of their magnetic softness, the role of local and macroscopic magnetic anisotropy, magnetoelastic effects, magnetostriction, and domain structure in the formation of the magnetisation reversal loop are revealed. The main sources of their magnetic anisotropy are indicated, among which the magnetoelastic anisotropy due to internal stresses and magnetostriction, as well as the anisotropy of directional ordering of atomic pairs, play a decisive role. In addition, the given magnetic anisotropy is a thermally activated process, the driving force of which is the interatomic magnetic interaction, and the efficiency of its formation increases with a decrease in the magnetostriction of the alloy. The mechanisms of induction of uniaxial anisotropy during annealing in a magnetic field and thermomechanical processing are presented, as well as their influence on the coercive force, magnetic permeability, and magnetisation reversal losses. As determined, the temperature and time instabilities of their magnetic properties are associated with the stabilisation of domain boundaries due to directional atomic ordering, and their study is carried out using disaccommodation. The prospects of using amorphous soft magnetic materials with zero magnetostriction in modern mid-range- and high-frequency electromagnetic devices are shown.

Keywords: amorphous metal ribbon, magnetic properties, thermal and thermomagnetic treatments, magnetic anisotropy, disaccommodation.

DOI: https://doi.org/10.15407/ufm.27.02.***

Citation: V.V. Kyrylchuk , V.K. Nosenko, B.S. Baitalyuk, I.K. Yevlash, A.V. Nosenko, V.E. Iakovlev, M.S. Nizameyev, and V.A. Dekhtyarenko, Amorphous Alloys as a Promising Class of Functional Materials. Pt. 2. Magnetic Properties, Magnetic Anisotropy, and Disaccommodation, Progress in Physics of Metals, 27, No. 2: ***–*** (2026)

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