EFFECT OF MULTILAYER LAMINATION ON THE PERFORMANCE AND SENSITIVITY OF FLUXGATE MAGNETIC SENSORS

Authors

  • Anh Tam Ho Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, Vietnam National University
  • Nguyen Thuc Vu Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, Vietnam National University
  • Thi Ngoc Nguyen Department of Advanced Materials Science and Nanotechnology, Vietnam Academy of Science and Technology, University of Science and Technology of Hanoi
  • Minh Vuong Pham Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, Vietnam National University
  • Huy Hoang Do Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, Vietnam National University
  • Dinh Lam Vu Graduate University of Science and Technology, Vietnam Academy of Science and Technology
  • Linh Khuong Tran Office of Logistics and Facilities Management, Le Quy Don Technical University
  • Tung Anh Doan Faculty of Physics and Chemical Engineering, Le Quy Don Technical University
  • Dinh Vi Le Faculty of Physics and Chemical Engineering, Le Quy Don Technical University

DOI:

https://doi.org/10.56651/lqdtu.jst.v4.n1.1097.pce

Keywords:

Magnetic sensors, fluxgate, numerical simulation, low-magnetic field

Abstract

This study investigates the influence of multi-layered ferromagnetic core structures on the performance of fluxgate magnetic sensors. Utilizing ultra-soft Metglas amorphous ribbons, core configurations ranging from one to five layers were fabricated and analyzed through a combined approach of finite element numerical simulation and experimental characterization. Simulation results reveal that increasing the number of core layers significantly enhances the average demagnetizing factor (nearly doubling for the 5L structure compared to the 1L), leading to a 12% reduction in effective magnetic induction. Experimental data demonstrate that the single-layer configuration achieves an optimal sensitivity of approximately 1200 V/T with a resolution of 300 nT. Conversely, increasing the number of magnetic layers extends the linear dynamic range from ±0.25 mT to over ±0.9 mT, albeit at the cost of reduced sensitivity 54 V/T for the 5L structure. This research confirms the trade-off between sensitivity and operating range modulated by multi-layer architectures, providing a critical foundation for optimizing fluxgate sensors for specific application requirements.

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Published

2026-04-24

Issue

Vol. 4 No. 1 (2026)

Section

Articles