Exchange coupling and dipolar interactions in FINEMET/Fe50Pd50 composites ribbons

Guo, Yongbin; Ma, L.; Cao, Yang; Jia, Chenglong; Xiao, Li; Xie, Wei; Zhao, Zhenjie

doi:10.1016/j.jmmm.2021.167948

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…However, the GMI curves of the bare FINEMET ribbon are symmetrical. [18] Because the FINEMET ribbon and FePd film have different magnetic structures, the FePd film with the longitudinal structure generates a bias field (H b ) on the FINEMET ribbon. The generation mechanism of the H b is the dipole-dipole interactions between the FePd film and the FINEMET ribbon.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In the magnetic sensors, the magnetizations of soft magnetic materials are modulated by exchange coupling and magnetic dipole interactions in the external magnetic field. [18] The dipolar interactions are long-range interactions that can strongly modify the magnetic response of the system to external excitation. [19] The explanations for the AGMI of composite materials mainly focus on exchange coupling and ignore the magnetic dipole interactions.…”

Section: Introductionmentioning

confidence: 99%

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Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO₂/FePd composite ribbons

Guo

Wang

et al. 2023

Chinese Phys. B

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The dipolar interactions were investigated through the asymmetric magnetoimpedance in FINEMET/SiO2/FePd composite ribbons. The interface between the hard (FePd layer) and soft (FINEMET ribbon) phases was coherent by SiO2 layer in FINEMET/SiO2/FePd composite ribbons, which effectively induced dipolar interactions. The contribution of dipolar interactions to the bias field (H b ) by asymmetrical giant magnetoimpedance and magnetic properties was analyzed. The results show that H b response decreases with the increase of the SiO2 layer thickness. It indicated that the linear region near-zero field can be tuned by the thickness of SiO2 layer. These results allowed the GMI ratio (58 %) and characteristic frequency (500 kHz) were optimized. The transverse and longitudinal magnetic domain structure of FINEMET ribbon and FePd film were confirmed, respectively. The composite ribbons with high GMI ratio and low frequency can apply in linear magnetic sensors.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO₂/FePd composite ribbons

Guo

Wang

et al. 2023

Chinese Phys. B

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“…The magnetic properties and inter-layer coupling of Fe-based composite ribbon strips have also been investigated. In order to analyze the change in MI curves as a result of different thicknesses of coatings, the effect of various thicknesses of Fe 50 Pt 50 , FePd, IGZO, and FeGa on the surface of Fe-based ribbons (width, 0.6-3 mm) by magnetron sputtering have been evaluated [23][24][25][26]. Research results show that there is an optimal thickness of coatings for the best MI effect.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Magnetoimpedance Effect in Co-Based Micron Composite CoFeNiSiB Ribbon Strips Coated by Carbon and FeCoGa Nanofilms for Sensing Applications

Yang,

Liu,

Chen

et al. 2024

Sensors

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Quenched Co-based ribbon strips are widely used in the fields of magnetic amplifier, magnetic head material, magnetic shield, electric reactor, inductance core, sensor core, anti-theft system label, and so on. In this study, Co-based composite CoFeNiSiB ribbon strips with a micron width were fabricated by micro-electro-mechanical systems (MEMS) technology. The carbon and FeCoGa nanofilms were deposited for surface modification. The effect of carbon and FeCoGa nanofilm coatings on the crystal structure, surface morphology, magnetic properties, and magnetoimpedance (MI) effect of composite ribbon strips were systematically investigated. The results show that the surface roughness and coercivity of the composite ribbon strips are minimum at a thickness of the carbon coating of 60 nm. The maximum value of MI effect is 41% at 2 MHz, which is approximately 2.4 times greater than plain ribbon and 1.6 times greater than FeCoGa-coated composite ribbon strip. The addition of a carbon layer provides a conductive path for high frequency currents, which effectively reduces the characteristic frequency of the composite ribbon strip. The FeCoGa coating is able to close the flux path and reduce the coercivity, which, in turn, increases the transverse permeability and improves the MI effect. The findings indicate that a successful combination of carbon layer and magnetostrictive FeCoGa nanofilm layer can improve the MI effect and magnetic field sensitivity of the ribbon strips, demonstrating the potential of the composite strips for local and micro area field sensing applications.

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“…Manifestations ascribed to the interlayer magnetic interactions have been reported in the last years through different ways, ranging from techniques probing the quasi-static magnetic properties, as the familiar magnetometry [14][15][16] and the magnetoresistance [17][18][19] , till the dynamic magnetic response, considering for instance the effects of ferromagnetic resonance [20][21][22] and magnetoimpedance 23,24 . Of our concern, here we concentrate on the magnetoimpedance effect (MI).…”

mentioning

confidence: 99%

“…Although much effort has been made to the exploration of magnetic materials with specific features for application as sensor elements in devices, MI has yet been taken as a playground for investigations on the physics behind the effect and the mechanisms controlling the dynamic magnetic response. More recently, it has been shown that materials exhibiting asymmetric magnetoimpedance (AMI) effect, such as wires [29][30][31] , ribbons 23,24,[32][33][34] , and films [35][36][37][38][39][40][41] , arise as promising candidates for applications, opening possibilities for the use of this kind of materials in auto-biased linear magnetic field sensors. Remarkably, for biphase ferromagnetic systems, with hard and soft ferromagnetic phases intermediated by a non-magnetic layer acting together, AMI has been linked with the existence of interactions between magnetic layers 27,28 .…”

mentioning

confidence: 99%

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

Silva

Gamino

Oliveira

et al. 2023

Sci Rep

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We report on the nature of the interlayer magnetic interactions in NiFe/Cu/Co films. By probing the quasi-static and dynamic magnetic properties of biphase ferromagnetic films, with soft and hard ferromagnetic phases intermediated by a non-magnetic layer, we address aspects of the coupling between magnetic layers. Our results demonstrate the nature of the interlayer magnetic coupling in biphase films. We also disclose the asymmetric magnetoimpedance effect as a fingerprint of the nature of the magnetic interlayer interactions playing key role in the magnetization dynamics of the system. We revisit in literature data and ideas on the asymmetric magnetoimpedance and the nature of the magnetic interactions in biphase ferromagnetic systems. Then, we compare our findings with results for biphase ribbons and microwires. Our observations raise the fundamental similarities and differences in the asymmetric magnetoimpedance of these structures.

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Exchange coupling and dipolar interactions in FINEMET/Fe50Pd50 composites ribbons

Cited by 10 publications

References 32 publications

Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO₂/FePd composite ribbons

Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO₂/FePd composite ribbons

Enhanced Magnetoimpedance Effect in Co-Based Micron Composite CoFeNiSiB Ribbon Strips Coated by Carbon and FeCoGa Nanofilms for Sensing Applications

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

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Exchange coupling and dipolar interactions in FINEMET/Fe50Pd50 composites ribbons

Cited by 10 publications

References 32 publications

Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO2/FePd composite ribbons

Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO2/FePd composite ribbons

Enhanced Magnetoimpedance Effect in Co-Based Micron Composite CoFeNiSiB Ribbon Strips Coated by Carbon and FeCoGa Nanofilms for Sensing Applications

On the nature of the interlayer magnetic interactions in biphase ferromagnetic films

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Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO₂/FePd composite ribbons

Asymmetric magnetoimpedance effect and dipolar interactions of FINEMET/SiO₂/FePd composite ribbons