Co-rich Amorphous Microwires with Improved Giant Magnetoimpedance Characteristics Due to Glass Coating Etching

被引：0
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作者：
V. A. Bautin
N. S. Kholodkov
A. V. Popova
S. A. Gudoshnikov
N. A. Usov
机构：
[1] National University of Science and Technology «MISiS»,Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation
[2] Russian Academy of Sciences,undefined
[3] (IZMIRAN),undefined
来源：
JOM | 2019年 / 71卷
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摘要：
Glass-coated Co-rich amorphous microwires are very promising for the development of tiny magnetic sensors that can be used in portable electronic devises. In this study, a substantial decrease in the residual quenching stress in Co-rich microwires is achieved by reducing the thickness of the glass coating by means of precise etching of the wire in a specially designed gel. This effect is confirmed experimentally by means of the small-angle magnetization rotation method as well as by direct measurement of the off-diagonal component of the giant magnetoimpedance (GMI) tensor of wires with different thicknesses of glass coating as a function of the applied magnetic field. A reduction in the thickness of the glass coating to the range of 0.5–2.0 µm resulted in a nearly twofold increase in the steepness of the off-diagonal GMI component of the studied Co-rich microwires. Therefore, this method can be used to improve the sensitivity of miniature magnetic sensors to weak external magnetic fields.
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页码：3113 / 3118
页数：5
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