软磁非晶丝巨磁阻抗效应传感器研究进展与应用

基于软磁非晶丝巨磁阻抗效应(GMI)的传感器是近年来磁传感器领域的研究热点之一.非晶丝具有良好的软磁特性:如低电阻率、高磁导率、高饱和磁感应强度、低矫顽力、低损耗以及特殊的磁畴结构等,利用其GMI效应制成磁传感器,其突出优点是微型化、高灵敏度、快速响应、高温度稳定性和低功耗.本文讨论了软磁非晶丝巨磁阻抗效应的机理,叙述了非晶丝GMI传感器的研究进展,着重对敏感材料性能及制备、GMI器件结构形式、传感电路等作了介绍,并指出了GMI目前存在的问题及将来的发展趋势.最后对GMI的应用作了展望.

Applications and Progress in the Study of Giant Magneto-Impedance Effect in Soft Magnetic Amorphous Wires & GMI Sensors

Magnetic sensor utilizing the giant magneto-impedance effect(GMI)in amorphous wires is one of hot points on magnetic sensor research in recent years.Amorphous wires have good soft magnetic properties,such as low resistivity,high magnetic permeability,high saturation magnetic flux density,low coercivity,low loss and special magnetic domain structure,which can be made into magnetic sensors utilizing their GMI effect.The outstanding advantage of GMI magnetic sensor is its miniaturization,high sensitivity,quick...