南京大学学报（自然科学版）2017，Vol.53Issue(1)：128-134,7.DOI:10.13232/j.cnki.jnju.2017.01.018
基于磁场传感器的层状磁电复合振子磁阻抗效应
Magnetoimpedance effect in layered magnetoelectric compositevibrator based on magnetic field sensor
摘要
Abstract
In this article,magnetoimpedance effect of trilayer and five layers magnetostrictive/piezoelectric composite vibrator were theoretical and experimental studied by means of magnetoelectric coupling theory and equivalent circuit method.Theoretical studies have shown that magnetoimpedance effect of magnetostrictive/piezoelectric composite vibrator caused by internal stress changes,which we attribute to the magnetostriction effect.Experimental results show that the magnetoimpedance of five layers magnetoelectric composite vibrator is significantly greater than that of three layers magnetoelectric composite vibrator both in resonance and anti-resonance state.The experimental are results in consistent with the equivalent circuit analysis results,and the magnetoimpedance phenomenon can be explain by the product effect of magnetoelectric coupling.Under resonance and anti-resonance frequency of five layers magnetoelectric composite vibrator,the maximum magneticimpedance ΔZ/Z were 46.9% and 60%,respectively,but under resonance and anti-resonance frequency of trilayer magnetoelectric composite vibrator,the maximum magneticimpedance ΔZ/Z were 13% and 30.2%,respectively.The magnetic sensitivity are as low as 2.2×10-10 T?μΩ-1 and 2.5×10-11 T?μΩ-1 at resonance and anti-resonance frequency for trilayer and five layers magnetostrictive/piezoelectric composite vibrator,respectively.The results for magnetoelectric composite vibrator provide theoretical and experimental basis in the magnetic anomaly detection sensor application,and it is helpful to optimize the structure of the magnetic field sensor.关键词
磁阻抗/谐振频率/反谐振频率/磁分辨率Key words
magnetoimpedance/resonance frequency/anti-resonance frequency/magnetic sensitivity分类
通用工业技术引用本文复制引用
何文强,王巍..基于磁场传感器的层状磁电复合振子磁阻抗效应[J].南京大学学报（自然科学版）,2017,53(1):128-134,7.基金项目
南京师范大学国家自然科学基金预研项目(XYY2015015) （XYY2015015）
