Relaxation Annealing Influence on the Magnetic Properties and Magnetic Impedance of Amorphous Co-Based Wires

D. A. Bukreev; Букреев Д. А.; M. S. Derevyanko; Деревянко М. С.; A. A. Moiseev; Моисеев А. А.; G. V. Kurlyandskaya; Курляндская Г. В.; A. V. Semirov; Семиров А. В.

doi:10.31857/S0015323023601204

Relaxation Annealing Influence on the Magnetic Properties and Magnetic Impedance of Amorphous Co-Based Wires

Authors: Bukreev D.A.¹, Derevyanko M.S.¹, Moiseev A.A.¹, Kurlyandskaya G.V.², Semirov A.V.¹
Affiliations:
1. Irkutsk State University
2. Ural Federal University Named after the First President of Russia B.N. Yeltsin
Issue: Vol 124, No 12 (2023)
Pages: 1159-1164
Section: ЭЛЕКТРИЧЕСКИЕ И МАГНИТНЫЕ СВОЙСТВА
URL: https://ruspoj.com/0015-3230/article/view/663016
DOI: https://doi.org/10.31857/S0015323023601204
EDN: https://elibrary.ru/CKTXDB
ID: 663016

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Abstract

Abstract—

The results of a study of the influence of the 2 hours relaxation annealing at a temperature of 620 K on the magnetoimpedance effect (MI) in amorphous Co₆₆Fe₄Nb_2.5Si_12.5B₁₅ wires are presented. It was found that MI at low ac frequencies after heat treatment increases noticeably, while it changes slightly at high frequencies. Using magneto-impedance tomography, it is shown that this is due to the fact that the changes in magnetic properties caused by heat treatment are not the same in different regions of the wire. Thus, in the surface region with a thickness of about 2.5 μm, the magnetic permeability remains almost unchanged, but in the internal regions it increases significantly after annealing.

Keywords

magneto-impedance tomography, magnetoimpedance, finite element method, computer simulation, amorphous wires

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