DESIGN AND FABRICATION OF SHAPE MORPHING MAGNETO-IMPEDANCE MAGNETIC SENSOR

  • Van Thin Pham Faculty of Physics and Chemical Engineering, Le Quy Don Technical University
  • Hai Ninh Dang Faculty of Physics and Chemical Engineering, Le Quy Don Technical University
  • Quang Dat Tran 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
  • Van Trung Tong Electronic Factory Z181
  • Thi Thanh Ngo Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, Vietnam National University, Hanoi
  • Thi Ngoc Nguyen Department of Advanced Materials Science and Nanotechnology, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology
  • Nguyen Thuc Vu VNU Key Laboratory for Micro-Nano Technology, VNU University of Engineering and Technology, Vietnam National University, Hanoi
  • Anh Tam Ho VNU Key Laboratory for Micro-Nano Technology, VNU University of Engineering and Technology, Vietnam National University, Hanoi
  • Thi Huong Giang Do Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, Vietnam National University, Hanoi; VNU Key Laboratory for Micro-Nano Technology, VNU University of Engineering and Technology, Vietnam National University, Hanoi
  • Van Tuan Nguyen Faculty of Physics and Chemical Engineering, Le Quy Don Technical University
Keywords: Magnetoimpedance sensor, magnetic sensors, magnetic energies, isotropy

Abstract

The magnetoimpedance (MI) effect is characterized by the alteration in the impedance of soft magnetic materials when subjected to a magnetic field while a high-frequency alternating current flows through them. In this study, we engineered two distinct sensor architectures utilizing amorphous FeCSi magnetic ribbon: a single-bar structure with the dimension of 10 mm × 90 μm × 20 μm and a meander structure consisting of 13 parallel single bars. These structures were miniaturized through advanced techniques combining laser engraving and chemical etching. The magnetic analysis reveals that the meander structure exhibits a pronounced dependency on the angle θ between the magnetic field and the sensor orientation, enhancing its soft magnetic properties by up to fivefold compared to the single-bar design. This enhancement might be attributed to a reduction in the demagnetization effect and shape anisotropy energy within the meander sensor. Furthermore, the analysis of the MI effect indicates that the resonance frequency remains unaffected by external magnetic fields for both sensor types. Notably, the meander sensor demonstrates exceptional MI ratio values exceeding 82%, representing a remarkable 24-fold increase over the 3.5% observed in the single-bar sensor. Additionally, the isotropy - quantified as the MI ratio's dependence on angle θ, and magnetic field sensitivity are significantly improved in the meander configuration. These advancements in soft magnetic and physical properties are correlated to the domain structure of the sensor, particularly its transverse magnetic permeability, as evidenced by micromagnetic simulations conducted using Mumax3. With its superior MI ratio, isotropy, and heightened magnetic field sensitivity, the meander-type magnetic field sensor presents substantial potential for applications across diverse fields, ranging from biological systems to specialized practical missions.

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Published
2024-11-07
Issue
Vol. 2 No. 02 (2024)
Section
SCIENTIFIC RESEARCH