Magnetoelectric coupling of a magnetoelectric flux gate sensor in vibration noise circumstance

Zhaoqiang Chu,Xiangyu Gao,Shuxiang Dong,Huaduo Shi,Jingen Wu

doi:10.1063/1.5012061

Abstract

A magnetoelectric (ME) flux gate sensor (MEFGS) consisting of piezoelectric PMN-PT single crystals and ferromagnetic amorphous alloy ribbon in a self-differential configuration is featured with the ability of weak magnetic anomaly detection. Here, we further investigated its ME coupling and magnetic field detection performance in vibration noise circumstance, including constant frequency, impact, and random vibration noise. Experimental results show that the ME coupling coefficient of MEFGS is as high as 5700 V/cm*Oe at resonant frequency, which is several orders magnitude higher than previously reported differential ME sensors. It was also found that under constant and impact vibration noise circumstance, the noise reduction and attenuation factor of MEFGS are over 17 and 85.7%, respectively. This work is important for practical application of MEFGS in real environment.

Highlights

Magnetoelectric (ME) effect is defined as the polarization induced by a magnetic field (H) or the magnetization induced by an electric field (E).[1]
A magnetoelectric flux gate sensor (MEFGS) operating in self-differential longitudinal vibration mode was proposed for detecting weak magnetic anomaly.[22]
We will further investigate ME coupling, vibration cancellation performances and alternating current (AC) magnetic signal detection of the MEFGS under vibration noise circumstance, which are important for practical magnetic sensor application

Summary

Introduction

Magnetoelectric (ME) effect is defined as the polarization induced by a magnetic field (H) or the magnetization induced by an electric field (E).[1]. A magnetoelectric flux gate sensor (MEFGS) operating in self-differential longitudinal vibration mode was proposed for detecting weak magnetic anomaly.[22] In this work, we will further investigate ME coupling, vibration cancellation performances and alternating current (AC) magnetic signal detection of the MEFGS under vibration noise circumstance, which are important for practical magnetic sensor application.

Results

Conclusion