Influences of Anisotropic Equivalent Field and Magnetic Damping Coefficient on Giant Magnetoimpedance Effect of Cylindrical Alloy Fibers: Theoretical Magnetoimpedance Calculations
Tao Wang,
Yingjie Zhang,
Jingtao Lei,
Qiuyuan Wang,
Jinbo Chen,
Hengyu Li,
Zhizheng Wu,
Ze Cui,
Mei Liu,
Jinjun Rao
Affiliations
Tao Wang
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Yingjie Zhang
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Jingtao Lei
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Qiuyuan Wang
Guangzhou Panyu District Health Management Center, Guangzhou 511450, China
Jinbo Chen
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Hengyu Li
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Zhizheng Wu
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Ze Cui
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Mei Liu
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Jinjun Rao
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
In this paper, the giant magneto-impedance (GMI) model of a cylindrical alloy fiber was established by the Maxwell equation and Landau–Lifshitz equation to simulate the influence of physical parameters of cylindrical alloy fiber on GMI under different control parameters. MATLAB was employed to calculate the magneto-impedance of cylindrical fibers and draw its curves. We found that when the anisotropic equivalent field of the fiber changes from 10Oe to 50Oe, the peak position of the GMI ratio also moves from about 10Oe to 50Oe, and the peak value gradually increases from 100% to 300%. The GMI ratio increased rapidly with the decrease in the magnetization damping coefficient. Our findings could further guide the design of supersensitive micro GMI sensors by optimally regulating the magnetic damping coefficient, the angle between the external magnetic field and easy axis and the anisotropic equivalent field of cylindrical alloy fibers.
