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Investigation the influence of structure parameters on giant-magnetoimpedance effect measured by non-contact method

Zhu Feng (Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai, China)
Shaotao Zhi (Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai, China)
Xuecheng Sun (Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai, China)
Lili Yan (Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai, China)
Cui Liu (School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China)
Chong Lei (Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai, China)

Sensor Review

ISSN: 0260-2288

Article publication date: 11 October 2020

Issue publication date: 19 November 2020

130

Abstract

Purpose

This paper aims to investigate the influence of structure parameters on giant-magnetoimpedance (GMI) effect measured by non-contact method.

Design/methodology/approach

The GMI sensor contains a Co-based internal magnetic core fabricated by laser cutting and an external solenoid. The influences of magnetic permeability of magnetic core and structure parameters on GMI effect were calculated in theoretical model. The output impedance, resistance, reactance and GMI ratio were measured by non-contact method using impedance analyzer.

Findings

Enhancing external magnetic field intensity can decrease the magnetic permeability of core, which has vital influences on the magnetic property and the output response of GMI sensor. In addition, increasing the width of magnetic core and the number of solenoid turns can increase the maximum GMI ratio. The maximum GMI ratio is 3,230% with core width of 6 mm and solenoid turns of 200.

Originality/value

Comparing with traditional contact-measured GMI sensor, the maximum GMI ratio and the magnetic field sensitivity are improved and the power consumption is decreased in non-contact measured GMI sensor. GMI sensor measured by non-contact method has a wide range of potential applications in ultra-sensitive magnetic field detection.

Keywords

Acknowledgements

This work is supported by The National Natural Science Foundation of China (No. 61273065), National Science and Technology Support Program (2012BAK08B05), Support Fund of Shanghai Jiao Tong University (AgriX2015005), Support Fund of Joint Research Center for Advanced Aerospace Technology of Shanghai Academy of Spaceflight Technology-Shanghai Jiao Tong University (USCAST2015-2), Support Fund of Aerospace Technology (15GFZ-JJ02-05), the Analytical and Testing Center in Shanghai Jiao Tong University and the Center for Advanced Electronic Materials and Devices in Shanghai Jiao Tong University.

Citation

Feng, Z., Zhi, S., Sun, X., Yan, L., Liu, C. and Lei, C. (2020), "Investigation the influence of structure parameters on giant-magnetoimpedance effect measured by non-contact method", Sensor Review, Vol. 40 No. 6, pp. 647-656. https://doi.org/10.1108/SR-07-2019-0169

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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