High-performance Magnetoimpedance Sensors in Micropatterned Multi-meander Line Designs

Ngo Thi Thanh, Nguyen Van Tuan, Dang Huy Hoang, Pham Minh Vuong, Hoang Si Hong, Do Duy Phu, Ho Anh Tam, Vu Nguyen Thuc, Do Thi Huong Giang

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Published Jun 23, 2025
DOI: https://doi.org/10.25073/2588-1124/vnumap.5002

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THI THANH, Ngo et al. High-performance Magnetoimpedance Sensors in Micropatterned Multi-meander Line Designs. VNU Journal of Science: Mathematics - Physics, [S.l.], v. 41, n. 3, june 2025. ISSN 2588-1124. Available at: <https://js.vnu.edu.vn/MaP/article/view/5002>. Date accessed: 04 oct. 2025. doi: https://doi.org/10.25073/2588-1124/vnumap.5002.
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Vol 41 No 3
Section
Original Articles

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Abstract

In this work we present the design and fabrication of micro-scale magnetoimpedance (MI) sensors based on FeSiC soft magnetic ribbon, using laser engraving and chemical etching to create conventional meander (1M), meander structures in parallel (4Mpa) and perpendicular (4Mpe) configurations. Experimental characterization and finite element simulations revealed that assembling four meander elements enhances the MI effect by up to an order of magnitude compared to the 1M sensor. The 4Mpa configuration exhibits strong anisotropic MI response and lower frequency resonance of 1.5 GHz, while the 4Mpe structure offers a slightly lower MI ratio of 180% but with near-isotropic behavior. These differences arise from uniaxial versus multi-axial magnetic anisotropy, respectively, thanked to the numerical simulation. The results demonstrate that sensor performance can be tailored by selecting appropriate meander arrangements, enabling enhanced sensitivity and directional control for diverse applications in biomedical, industrial, and high-frequency sensing fields.


 

Keywords: Magnetoimpedance, Magnetic energy, Meander design, Magnetic anisotropy

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