High sensitivity zero-biased magnetic field sensor based on multiphase laminate heterostructures with FeCuNbSiB nanocrystalline soft magnetic alloy

Jing Qiu,Ping Li,Hengjia Chen,Yumei Wen

doi:10.1063/1.4942823

Abstract

In this paper, a high sensitivity zero-biased magnetic field sensor based on multiphase laminate heterostructures consisting of FeCuNbSiB/Terfenol-D (Tb1−xDyxFe2)/PZT (Pb(Zr1-x,Tix)O3)/Terfenol-D/PZT/Ternol-D/FeCuNbSiB (FMPMPMF) is presented, whose ME coupling characteristics and sensing performances have been investigated. Compared to traditional Terfenol-D/PZT/Terfenol-D (MPM) and Terfenol-D/PZT/Terfenol-D/PZT/Terfenol-D (MPMPM) sensors, the zero-biased ME coupling characteristics of FMPMPMF sensor were significantly improved, owing to a build-in magnetic field in FeCuNbSiB/Terfenol-D layers. The optimum zero-biased resonant ME voltage coefficient of 3.02 V/Oe is achieved, which is 1.65 times as great as that of MPMPM and 2.51 times of MPM sensors. The mean value of low-frequency ME field coefficient of FMPMPMF reaches 122.53 mV/cm Oe, which is 2.39 times as great as that of MPMPM and 1.79 times of MPM sensors. Meanwhile, the induced zero-biased ME voltage of FMPMPMF sensor shows an excellent linear relationship to ac magnetic field both at the low frequency (1 kHz) and the resonant frequency (106.6 kHz). Remarkably, it indicates that the proposed zero-biased magnetic field sensor give the prospect of being able to applied to the field of highly sensitive ac magnetic field sensing.

Highlights

A high sensitivity zero-biased magnetic field sensor based on multiphase laminate heterostructures consisting of FeCuNbSiB/Terfenol-D (Tb1-xDyxFe2)/PZT (Pb(Zr1-x,Tix)O3)/Terfenol-D/PZT/Ternol-D/FeCuNbSiB (FMPMPMF) is presented, whose ME coupling characteristics and sensing performances have been investigated
The high-permeability FeCuNbSiB soft magnetic layer can be treated as a static magnetic field source, which will induce a magnetic field in the Terfenol-D layer
This paper presents a high sensitivity zero-biased magnetic field sensor based on FMPMPMF multiphase laminate heterostructures with FeCuNbSiB nanocrystalline soft magnetic alloy

Summary

INTRODUCTION

Magnetoelectric (ME) response has attracted continuously increasing interest due to its potential applications in many new multifunctional devices, including energy harvesters and magnetic field sensors.[1,2,3,4,5] Recently, the application of magnetostrictive (e.g., TerfenolD)/piezoelectric (e.g., PZT) laminate composites in detection of magnetic field has been widely investigated, owing to their strong ME responses and high ME conversion coefficient at room temperature.[6,7,8,9] owing to the magnetostrictive strain of Terfenol-D will increase with the bias magnet field (Hb) increase, the saturation magnetostrictive coefficient of Terfenol-D can be obtain only under a high bias. Most of the reported ME composites require external dc bias magnetic field to obtain high magnetic sensitivity, which increasing their sizes and costs a lot.[10,11,12] To overcome these limitations, more and more researchers have focused on zero-biased ME sensor with the multiphase laminate composites.[13,14,15] utilizing an internal magnetic bias of the magnetostrictive materials in ME composite is a feasible way to solve this problem. The experiment results indicate that the resonant and low-frequency zero-biased ME voltage coefficient of the FMPMPMF were enhanced greatly in comparison with MPMPM and MPM. The sensing properties of FMPMPMF laminate heterostructures have been researched, the induced ME voltages exhibits a good linear relationship with the ac magnetic field Hac both at resonant and low-frequency conditions in a wide range. It provides a new approach to achieving high sensitivity zero-biased magnetic field sensor using multilayer laminate heterostructures

EXPERIMENT

RESULTS AND DISCUSSION

CONCLUSIONS