Magnetoelectric Vortex Magnetic Field Sensors Based on the Metglas/PZT Laminates.

Do Thi Huong Giang,Nguyen Van Tuan,Ho Anh Tam,Nguyen Huu Duc,Nguyen Thi Ngoc,Nguyen Trong Vinh,Phung Anh Tuan,Vu Thi Ngoc Khanh

doi:10.3390/s20102810

Abstract

This paper describes the route, from simulations toward experiments, for optimizing the magnetoelectric (ME) geometries for vortex magnetic field sensors. The research is performed on the base of the Metglas/Piezoelectric (PZT) laminates in both open and closed magnetic circuit (OMC and CMC) geometries with different widths (W), lengths (L), and diameters (D). Among these geometries, the CMC laminates demonstrate advantages not only in their magnetic flux distribution, but also in their sensitivity and in their independence of the position of the vortex center. In addition, the ME voltage signal is found to be enhanced by increasing the magnetostrictive volume fraction. Optimal issues are incorporated to realize a CMC-based ME double sandwich current sensor in the ring shape with D × W = 6 mm × 1.5 mm and four layers of Metglas. At the resonant frequency of 174.4 kHz, this sensor exhibits the record sensitivity of 5.426 V/A as compared to variety of devices such as the CMC ME sensor family, fluxgate, magnetoresistive, and Hall-effect-based devices. It opens a potential to commercialize a new generation of ME-based current and (or) vortex magnetic sensors.

Highlights

In principle, a multiferroic device has been defined as a combination of two or more primary ferroic ordering phenomena in the same application, such as ferroelectric, ferromagnetic, and ferroelastic.Among its combinations, the ferroelectric–ferroelastic forms the basis of piezoelectric transducers, while the ferromagnetic–ferroelastic is used as piezomagnetic devices
One can see that for ring-type ME current sensors, despite the fact of their small size, light weight, and their high sensitivity, the number of publications is still rather modest compared with that of the ME fixed direction magnetic field sensors [3]
Considerable efforts have been undertaken to elaborate on a phenomenological description of the magnetoelectric voltage coefficient (MEVC), α ME = dE / dH

Summary

Introduction

A multiferroic device has been defined as a combination of two or more primary ferroic ordering phenomena in the same application, such as ferroelectric, ferromagnetic, and ferroelastic. The first attempt at measuring the current based on the ME effect directly was performed by Bichurin et al [5], while Dong et al [6,7,8] suggested that they could detect the vortex magnetic field (and/or current I) by using a ring-type ME laminate (called as the O-type) Their ideas were realized for a Terfenol-D/PZT ME ring-type laminate with a ME sensitivity as high as 5.5 V/cm.Oe at the frequency, f, of 1 kHz. Generally, one can see that for ring-type ME current sensors, despite the fact of their small size, light weight, and their high sensitivity, the number of publications is still rather modest compared with that of the ME fixed direction magnetic field sensors [3]. Recently realized a self-biased current sensor based on the SrFe12 O19 /FeCuNbSiB/PZT ME composite cantilever, while Bichurin et al [15] considered both the resonant and non-resonant type of ME current sensors, which exhibit a sensitivity of 0.34 V/A and 0.53 V/A, respectively These are based on the conventional open magnetic circuit (OMC) in rectangular shape (called as the I-type).

ME Laminate Geometries

ME Geometrics Simulation Design

Experimental

Conclusions