Investigation of magnetic field anneal in micro-patterned amorphous ribbon on giant magneto-impedance effect enhancement

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, Shanghai Jiao Tong University, Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai, China)
Lei Guo (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)
Chong Lei (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)
Yong Zhou (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)

Sensor Review

ISSN: 0260-2288

Publication date: 20 May 2019

Abstract

Purpose

This paper aims to investigate magnetic field anneal in micro-patterned Co-based amorphous ribbon on giant magneto-impedance (GMI) effect enhancement.

Design/methodology/approach

The amorphous ribbons were annealed in transverse and longitudinal magnetic field. The influence of different field annealing directions on GMI effect and impedance Z, resistance R and reactance X with a series of line width have been deeply analyzed.

Findings

In comparison with GMI sensors microfabricated by unannealed and transversal field annealed ribbons, GMI sensor which was designed and microfabricated by longitudinal field anneal ribbon performs better. The results can be explained by the domain wall motion and domain rotation during annealing process and the geometric structure of Co-based GMI sensor. In addition, shrinking the line width of GMI sensor can promote GMI effect significantly because of the effect of demagnetizing field, and the optimum GMI ratio is 209.7 per cent in longitudinal field annealed GMI sensor with 200 μm line width.

Originality/value

In conclusion, annealing in longitudinal magnetic field and decreasing line width can enhance GMI effect in micro-patterned Co-based amorphous ribbon.

Keywords

Acknowledgements

The author(s) of this article have not made their research dataset openly available. Any enquiries regarding the dataset can be directed to the corresponding author.

Citation

Feng, Z., Zhi, S., Guo, L., Lei, C. and Zhou, Y. (2019), "Investigation of magnetic field anneal in micro-patterned amorphous ribbon on giant magneto-impedance effect enhancement", Sensor Review, Vol. 39 No. 3, pp. 309-317. https://doi.org/10.1108/SR-04-2018-0079

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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