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Sensors 2016, 16(10), 1723; doi:10.3390/s16101723

The Disturbing Effect of the Stray Magnetic Fields on Magnetoimpedance Sensors

1
School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China
2
Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of electronic information and electrical engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Received: 23 August 2016 / Revised: 29 September 2016 / Accepted: 10 October 2016 / Published: 17 October 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [2142 KB, uploaded 17 October 2016]   |  

Abstract

The disturbing effect of the stray magnetic fields of Fe-based amorphous ribbons on the giant magnetoimpedance (GMI) sensor has been investigated systematically in this paper. Two simple methods were used for examining the disturbing effect of the stray magnetic fields of ribbons on the GMI sensor. In order to study the influence of the stray magnetic fields on the GMI effect, the square-shaped amorphous ribbons were tested in front, at the back, on the left and on the top of a meander-line GMI sensor made up of soft ferromagnetic films, respectively. Experimental results show that the presence of ribbons in front or at the back of GMI sensor shifts the GMI curve to a lower external magnetic field. On the contrary, the presence of ribbons on the left or on the top of the GMI sensor shifts the GMI curve to a higher external magnetic field, which is related to the coupling effect of the external magnetic field and the stray magnetic fields. The influence of the area and angle of ribbons on GMI was also studied in this work. The GMI sensor exhibits high linearity for detection of the stray magnetic fields, which has made it feasible to construct a sensitive magnetometer for detecting the typical stray magnetic fields of general soft ferromagnetic materials. View Full-Text
Keywords: disturbing effect; detect; giant magnetoimpedance; stray magnetic fields disturbing effect; detect; giant magnetoimpedance; stray magnetic fields
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MDPI and ACS Style

Wang, T.; Zhou, Y.; Lei, C.; Zhi, S.; Guo, L.; Li, H.; Wu, Z.; Xie, S.; Luo, J.; Pu, H. The Disturbing Effect of the Stray Magnetic Fields on Magnetoimpedance Sensors. Sensors 2016, 16, 1723.

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