Development of Magnetic Microwires for Magnetic Sensor Applications.

Valentina Zhukova,Mihail Ipatov,Arcady Zhukov,Paula Corte-Leon,Lorena Gonzalez-Legarreta,Juan Maria Blanco

doi:10.3390/s19214767

Valentina Zhukova, Mihail Ipatov + Show 4 more

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https://doi.org/10.3390/s19214767

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Abstract

Thin magnetic wires can present excellent soft magnetic properties (with coercivities up to 4 A/m), Giant Magneto-impedance effect, GMI, or rectangular hysteresis loops combined with quite fast domain wall, DW, propagation. In this paper we overview the magnetic properties of thin magnetic wires and post-processing allowing optimization of their magnetic properties for magnetic sensor applications. We concluded that the GMI effect, magnetic softness or DW dynamics of microwires can be tailored by controlling the magnetoelastic anisotropy of as-prepared microwires or controlling their internal stresses and domain structure by appropriate thermal treatment.

Highlights

IntroductionThe essential part of magnetic sensors is appropriate magnetic material
Magnetic sensors allowing control and monitoring of various processes and functions are essentially relevant for a great number of industries, such as data storage, home entertainment, energy harvesting and conversion, informatics, telecommunications, aircrafts, aerospace, automobiles, electronic surveillance, medicine, biology, etc. over many decades [1,2,3].The essential part of magnetic sensors is appropriate magnetic material
The primary parameter that allows to optimize the giant magneto-impedance (GMI) effect is the minimization of the magnetostriction coefficient, λs, either by selection of the appropriate chemical composition of the metallic alloys [9,47,48] or alternatively by the devitrification of the amorphous precursor [49]

Summary

Introduction

The essential part of magnetic sensors is appropriate magnetic material. Soft magnetic materials are used for a wide number of magnetic sensors [3]. One of the most prospective families of soft magnetic materials presenting a number of advantages such as excellent magnetic softness, fast and inexpensive fabrication process, dimensionality suitable for various sensors applications and good mechanical properties is the family of amorphous and nanocrystalline materials prepared using rapid melt quenching [4,5,6]. Best magnetic softness as well as physical properties linked to soft magnetic properties (i.e., giant magnetoimpedance, GMI) are reported for amorphous and nanocrystalline wires or ribbons [5,6,7,8,9,10]. Magnetic wires can present perfectly rectangular hysteresis loops and single and fast domain wall propagation [11,12,13,14,15,16]

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