Stress Reduction in Sputtered Thin NiFe 81/19 Layers for Magnetic Field Sensors

Jogschies, Lisa; Rittinger, J.; Klaas, Daniel; Wurz, Marc Christopher

doi:10.1016/j.protcy.2016.08.022

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Our results offer a platform for customization of the properties of magnetic thin films together with the additional features afforded by their mechanical flexibility and we hope this will stimulate further theoretical and experimental investigations into fabrication and studies of functional flexible thin films. While it is impossible to cover all the relevant literature, it is important to mention that other studies of NiFe thin films deposited onto flexible substrates have been recently reported, but unlike our studies, their emphasis was on the improvement of anisotropic magneto-resistance of flexible NiFe thin films [16,17]. It is also interesting to mention that our PVDF / NiFe samples are in fact free-standing, unclamped, bi-layer composite multiferroics consisting of piezoferroelectric active substrate / layer and ferromagnetic NiFe layer.…”

Section: Discussionmentioning

confidence: 99%

Development of flexible Ni 80 Fe 20 magnetic nano-thin films

Vopson

Naylor

Saengow

et al. 2017

Physica B: Condensed Matter

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Flexible magnetic Ni 80 Fe 20 thin films with excellent adhesion, mechanical and magnetic properties have been fabricated using magnetron plasma deposition. We demonstrate that flexible Ni 80 Fe 20 thin films maintain their non-flexible magnetic properties when the films are over 60 nm thick. However, when their thickness is reduced, the flexible thin films display significant increase in their magnetic coercive field compared to identical films coated on a solid Silicon substrate. For a 15 nm flexible Ni 80 Fe 20 film coated onto 110µm Polyvinylidene fluoride polymer substrate, we achieved a remarkable 355% increase in the magnetic coercive field relative to the same film deposited onto a Si substrate. Experimental evidence, backed by micro-magnetic modelling, indicates that the increase in the coercive fields is related to the larger roughness texture of the flexible substrates. This effect essentially transforms soft Ni 80 Fe 20 permalloy thin films into medium / hard magnetic films allowing not only mechanical flexibility of the structure, but also fine tuning of their magnetic properties.

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Section: Discussionmentioning

confidence: 99%

Development of flexible Ni 80 Fe 20 magnetic nano-thin films

Vopson

Naylor

Saengow

et al. 2017

Physica B: Condensed Matter

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“…Chlaihawi et al prepared ME flexible thin film sensor for H ac sensing applications [27]. Jogschies et al investigated thin NiFe 81/19 polyimide layers for magnetic field sensing [28]. Tekgül et al applied the CoFe/Cu magnetic multilayers on GMR sensors [29].…”

Section: Introductionmentioning

confidence: 99%

A Flexible Magnetic Field Sensor Based on AgNWs & MNs-PDMS

Zhang

Sun

et al. 2019

Nanoscale Res Lett

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This paper presents a new flexible magnetic field sensor based on Ag nanowires and magnetic nanoparticles doped in polydimethylsiloxane (AgNWs & MNs-PDMS) with sandwich structure. The MNs act as the sensitive unit for magnetic field sensing in this work. Besides, the conductive networks are made by AgNWs during deformation. Magnetostriction leads to the resistance change of the AgNWs & MNs-PDMS sensors. Furthermore, the MNs increase the conductive paths for electrons, leading to lower initial resistance and higher sensitivity of the resulting sensor during deformation. A point worth emphasizing is that the interaction of the AgNWs and MNs plays irreplaceable role in magnetic field sensing, so the resistance change during stretching and shrinking was investigated. The flexible magnetic field sensor based on the mass ratio of MNs and AgNWs is 1:5 showed the highest sensitivity of 24.14 Ω/T in magnetic field sensing experiment. Finally, the magnetostrictive and piezoresistive sensing model were established to explore the mechanism of the sensor.

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Advances in Flexible Magnetosensitive Materials and Devices for Wearable Electronics

Yang,

Li,

et al. 2024

Advanced Materials

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Emerging fields, such as wearable electronics, digital healthcare, the Internet of Things, and humanoid robots, have highlighted the need for flexible devices capable of recording signals on curved surfaces and soft objects. In particular, flexible magnetosensitive devices have garnered significant attention owing to their ability to combine the advantages of flexible electronics and magnetoelectronic devices, such as reshaping capability, conformability, contactless sensing, and navigation capability. Several key challenges must be addressed to develop well‐functional flexible magnetic devices. These include determining how to make magnetic materials flexible and even elastic, understanding how the physical properties of magnetic films change under external strain and stress, and designing and constructing flexible magnetosensitive devices. In recent years, significant progress has been made in addressing these challenges. This study aims to provide a timely and comprehensive overview of the most recent developments in flexible magnetosensitive devices. This includes discussions on the fabrications and mechanical regulations of flexible magnetic materials, the principles and performances of flexible magnetic sensors, and their applications for wearable electronics. Additionally, future development trends and challenges in this field are discussed.This article is protected by copyright. All rights reserved

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Stress Reduction in Sputtered Thin NiFe 81/19 Layers for Magnetic Field Sensors

Cited by 5 publications

References 4 publications

Development of flexible Ni 80 Fe 20 magnetic nano-thin films

Development of flexible Ni 80 Fe 20 magnetic nano-thin films

A Flexible Magnetic Field Sensor Based on AgNWs & MNs-PDMS

Advances in Flexible Magnetosensitive Materials and Devices for Wearable Electronics

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