Tailoring of Magnetic Properties of Amorphous Ferromagnetic Microwires
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This article is a brief review of new different ways to tailor the magnetic properties of amorphous ferromagnetic microwires of two types: glass-coated and glassless. Metallic core of the studied samples was manufactured from CoFe-, Co-, and CoFeNi-based alloys by quenching and drawing or by the Taylor-Ulitovsky methods. We tested the following options to tailor the magnetic properties: changing of the parameters of manufacturing process, annealing, magnetostatic interaction in the array of wires. For the first time, it was found that a system of Co-based microwires with nearly zero magnetostriction coefficient exhibits a step-like hysteresis loop. The same behavior was found for single microwires with compositions of Fe 77.5Si 7.5 B 15 and Fe 45Co 30Si 10 B 15 produced under certain conditions. The effect of stress-annealing was investigated for Fe 67.5Co 7.5 B 15Si 10, Fe 52.5Co 22.5 B 15Si 10, and Fe 37.5Co 37.5 B 15Si 10 glass-coated microwires.
KeywordsFerromagnetic microwire Magnetostatic interaction Magnetic properties
The work was carried out with financial support from the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of MISiS and in the framework of government assignment (No̱. 3.2582.2014/K and 3-2014-02). This work was supported also by RFBR under Project 12-02-00537, the Spanish Ministry of Economy and Competitiveness (MINECO) under Project MAT2013-47231-C2-1-P by the Basque Government under Saiotek13 PROMAGMI (S-PE13UN014) and DURADMAG (S-PE13UN007) projects.
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