title: The Disturbing Effect of the Stray Magnetic Fields on Magnetoimpedance Sensors.
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.
authors.affiliation: School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China. wangt@shu.edu.cn.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: 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. shangwujingshen@163.com.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: 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. leiqhd@sjtu.edu.cn.
authors.forename: Chong
authors.initials: C
authors.lastname: Lei
authors.affiliation: 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. zhist1987@sjtu.edu.cn.
authors.forename: Shaotao
authors.initials: S
authors.lastname: Zhi
authors.affiliation: 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. g2252330@sjtu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Guo
authors.affiliation: School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China. lihengyu@shu.edu.cn.
authors.forename: Hengyu
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China. zhizhengwu@shu.edu.cn.
authors.forename: Zhizheng
authors.initials: Z
authors.lastname: Wu
authors.affiliation: School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China. srxie@shu.edu.cn.
authors.forename: Shaorong
authors.initials: S
authors.lastname: Xie
authors.affiliation: School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China. luojun@shu.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Luo
authors.affiliation: School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China. phygood_2001@shu.edu.cn.
authors.forename: Huayan
authors.initials: H
authors.lastname: Pu
keywords: detect; disturbing effect; giant magnetoimpedance; stray magnetic fields