Giant magnetoimpedance effect and dipolar interactions of FINEMET/IGZO/CoFeSiB composite ribbons

Guo, Yongbin; Zhang, Xiaoxuan; Wang, Dao; Xu, Wei; Li, Yizhang; Li, Ké; Wang, Zhongmin; Zhao, Zhizhong

doi:10.1080/09276440.2023.2180852

Cited by 2 publications

(1 citation statement)

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“…Therefore, discovering a substance with elevated electrical conductivity in the form of a sandwich structure is important for the development of MI sensors with superior performance. A novel FINEMET/rGo/FeCo sandwich composite ribbon was proposed by Y. J. Chen et al [29]. The rGo layer can effectively reduce the surface roughness of Fe-based ribbons and the closed flux path.…”

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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Section: Introductionmentioning

confidence: 99%