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

被引：7
|
作者：
Bautin, V. A. [1 ]
Kholodkov, N. S. [1 ]
Popova, A. V. [2 ]
Gudoshnikov, S. A. [1 ,2 ]
Usov, N. A. [1 ,2 ]
机构：
[1] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia
[2] Russian Acad Sci, IZMIRAN, Pushkov Inst Terr Magnetism Ionosphere & Radio Wa, Troitsk 108480, Russia
来源：
JOM | 2019年 / 71卷 / 09期
关键词：
MAGNETIC-PROPERTIES; QUENCHING STRESSES; GMI; WIRES; MAGNETOSTRICTION;
D O I：
10.1007/s11837-019-03574-w
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 mu m 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.
引用
收藏
页码：3113 / 3118
页数：6
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