Magnetostrictive Fe-Ga Nanowires for actuation and sensing applications

Flatau, Alison B.; Stadler, Bethanie J. H.; Park, Jungjin; Reddy, K. Sai Madhukar; Downey, Patrick R.; Mudivarthi, Chaitanya; Order, Michael Van

doi:10.1016/b978-0-08-102832-2.00025-6

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…Here, we provide evidence for the existence of an additional magnetic noise mechanism related to the inherent magnetostriction of the applied ferromagnetic materials. The additional noise mechanism becomes particularly important when dealing with magnetostrictive devices: [62,63] such as actuators, [64] antennas, [26,65,66] data storage elements, [67,68] pressure sensors, [69][70][71] and magnetic field sensors. [53,[72][73][74] Magnetic noise theory is applied to describe ΔE-effect sensors as an example of modulated magnetoelastic magnetic field sensors.…”

Section: Introductionmentioning

confidence: 99%

A Magnetoelastic Twist on Magnetic Noise: The Connection with Intrinsic Nonlinearities

Spetzler,

McCord

2023

Adv Funct Materials

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Intrinsic magnetic noise limits the functionality of all magnetic field sensors and related devices using magnetic films as sensing elements. A novel origin of magnetic noise due to ferromagnetic material's magnetostriction is revealed by implementing a comprehensive multi‐level signal‐noise model and thoroughly validating it experimentally on magnetoelectric composite ΔE‐effect sensors. From electrical measurements and operando magnetic domain visualization, magnetic contributions are shown to dominate the noise floor and limit the overall performance of multi‐domain magnetoelastic sensors. The newly introduced noise contribution is correlated with the nonlinearity of the magnetostrictive properties. The effect on sensor output is particularly pronounced in magnetoelastic and magnetoelectric composite devices, but the results generally apply to all sensor devices incorporating magnetic materials. Therefore, the identified magnetic noise source makes a significant contribution to understanding the limitations of magnetic sensors and provides important guidelines for optimizing future magnetic sensors for low detectivity.

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Section: Introductionmentioning

confidence: 99%

A Magnetoelastic Twist on Magnetic Noise: The Connection with Intrinsic Nonlinearities

Spetzler,

McCord

2023

Adv Funct Materials

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“…Due to the advantages of high energy density, fast response speed, high Curie temperature and excellent magnetostriction properties, the Tb-Dy-Fe alloy was widely used in sensors, brakes, transducers, micro displacement drivers and shock absorbers in the 1970s [1][2][3][4], but its large saturation magnetic field and poor mechanical performance limited its extensive application [5]. As a new type of magnetostrictive material developed after Tb-Dy-Fe, the Fe-Ga alloy has the advantages of a low saturated magnetic field, good mechanical properties and low material cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al and La Doping on the Structure and Magnetostrictive Properties of Fe73Ga27 Alloy

Gong

et al. 2022

Materials

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The changes of microstructure, magnetostriction properties and hardness of the Fe73Ga27−xAlx alloy and (Fe73Ga27−xAlx)99.9La0.1 alloy (x = 0, 0.5, 1.5, 2.5, 3.5, 4.5) were studied by doping Al into the Fe73Ga27 and (Fe73Ga27)99.9La0.1 alloy, respectively. The results show that both the Fe73Ga27−xAlx alloy and (Fe73Ga27−xAlx)99.9La0.1 alloy are dominated by the A2 phase, and the alloy grains are obvious columnar crystals with certain orientations along the water-cooled direction. A proportion of Al atoms replaced Ga atoms, which changed the lattice constant of the alloy, caused lattice distortion, and produced vacancy effects which affected the magnetostriction properties. La atoms were difficult to dissolve in the matrix alloy which made the alloy grains smaller and enhanced the orientation along the (100) direction, resulting in greater magneto-crystalline anisotropy and greater tetragonal distortion, which is conducive to improving the magnetostriction properties. Fe73Ga24.5Al2.5 alloy has a saturation magnetostrictive strain of 74 ppm and a hardness value of 268.064 HV, taking into account the advantages of saturated magnetostrictive strain and high hardness. The maximum saturation magnetostrictive strain of the (Fe73Ga24.5Al2.5)99.9La0.1 alloy is 115 ppm and the hardness is 278.096 HV, indicating that trace La doping can improve the magnetostriction properties and deformation resistance of Fe-Ga alloy, which provides a new design idea for the Fe-Ga alloy, broadening their application in the field of practical production.

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“…Металлические наноструктуры (НС) широко изучаются благодаря их уникальным оптическим, электромагнитным и каталитическим свойствам. Большое количество работ посвящено синтезу, определению структурных, электрических и магнитных свойств, созданию сложной структуры массивов нанопроволок (НП) и нанотрубок (НТ) [1], в том числе и многослойных [2,3], моделированию физических свойств [4], а также использованию одиночных НТ/НП и их массивов для наноэлектронных устройств [5], для катализа [6], магнитной записи высокой плотности [7] и в биоприложениях [8,9]. НТ/НП могут быть синтезированы методом шаблонного синтеза, при этом наиболее эффективным способом является электроосаждение, позволяющее контролировать структуру, элементный и фазовый составы путем варьирования условий осаждения [7,10,11].…”

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