Influence of Torsion on Matteucci Effect Signal Parameters in Co-Based Bistable Amorphous Wire.

Tomasz Charubin,Michał Nowicki,Roman Szewczyk

doi:10.3390/ma12030532

Abstract

The Matteucci effect (ME) is one of the lesser-known magnetomechanical effects and is most prominent in bistable amorphous wires. It has some experimental applications—Matteucci effect-based magnetic field sensors are very easy to produce and have inherently linear, hybrid analog/digital output signal. The effect is still poorly understood, however, and although it relies on torsion of the wire to manifest, there is no available model, or much experimental data, which would quantitatively connect the ME with the sample twist. In this paper, experimental characteristics of ME signal parameters dependence on torsion in Co-based amorphous bistable wire are presented. The results hint at possible applications, such as rotation or critical current sensors, as well as the necessity of torsion control in the development of ME magnetic field sensors.

Highlights

Matteucci effect (ME) is one of many magnetomechanical effects described by early investigators of electromagnetic phenomena
The ME was later utilized in the development of various devices, such as magnetic field sensors [5], rotational speed sensors [3], critical current sensors [6], fast pulse generators [3] and in high precision magnetic quartz sensors, which, using a new switching sensing principle, have high sensitivity and temperature compensation [7]
The research indicated that torsion has a significant influence on the properties of a sensor based on amorphous wire utilizing ME voltage signal

Summary

Introduction

Matteucci effect (ME) is one of many magnetomechanical effects described by early investigators of electromagnetic phenomena. In ME, the circumferential magnetization component of a given material, mostly in the form of wire or tube, switches with the application of an axial magnetic field. This change induces a pulse of electrical voltage across the sample for each change of magnetization state. These pulses are called the Matteucci voltage [1]. The Wiegand effect [9] is similar from an application point of view but relies on axial magnetization change and requires additional pickup coils

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