Magnetoimpedance Effect in the Ribbon-Based Patterned Soft Ferromagnetic Meander-Shaped Elements for Sensor Application

Abstract

Amorphous and nanocrystalline soft magnetic materials have attracted much attention in the area of sensor applications. In this work, the magnetoimpedance (MI) effect of patterned soft ferromagnetic meander-shaped sensor elements has been investigated. They were fabricated starting from the cobalt-based amorphous ribbon using the lithography technique and chemical etching. Three-turn (S1: spacing s = 50 μm, width w = 300 μm, length l = 5 mm; S2: spacing s = 50 μm, width w = 400 μm, length l = 5 mm) and six-turn (S3: s = 40 μm, w = 250 μm, length l = 5 mm; S4: s = 40 μm, w = 250 μm and l = 8 mm) meanders were designed. The ‘n’ shaped meander part was denominated as “one turn”. The S4 meander possesses a maximum MI ratio calculated for the total impedance ΔZ/Z ≈ 250% with a sensitivity of about 36%/Oe (for the frequency of about 45 MHz), and an MI ratio calculated for the real part of the total impedance ΔR/R ≈ 250% with the sensitivity of about 32%/Oe (for the frequency of 50 MHz). Chemical etching and the length of the samples had a strong impact on the surface magnetic properties and the magnetoimpedance. A comparative analysis of the surface magnetic properties obtained by the magneto-optical Kerr technique and MI data shows that the designed ferromagnetic meander-shaped sensor elements can be recommended for high frequency sensor applications focused on the large drop analysis. Here we understand a single large drop as the water-based sample to analyze, placed onto the surface of the MI sensor element either by microsyringe (volue range 0.5–500 μL) or automatic dispenser (volume range 0.1–50 mL).

Comparison of magnetoimpedance behaviors in meander CoFeNiSiB amorphous ribbon for deformation sensing applications

“…The annealing was performed in an argon atmosphere using a gradient temperature increase to reach an internal chamber temperature of 350 • C. At this temperature, a magnetic field of 460 Oe, parallel to the short direction of the ribbon, was applied and maintained for two hours before gradually cooling down to room temperature. Details of the design and micropatterning fabrication method have been reported previously [29][30][31]. However, here, the difference from previous reports is that the micropatterned ribbon is peeled off from the glass substrate via dissolving AB glue.…”

Exponentes críticos estáticos, efectos de anisotropía, Hall y magneto-calórico, e interacciones magnéticas en cintas de aleaciones basadas en FeCr, FeCo y MnFe

“…Es interesante señalar que esa interacción es un ingrediente esencial en el surgimiento del efecto Hall extraordinario, como ya se comentó, así como del MCE. El efecto MGI ha propiciado que los vidrios metálicos magnetoimpedativos se consideren promisorios en el desarrollo de sensores de alta sensibilidad (Melnikov et al, 2022;Zou et al, 2019;Yang et al, 2019;Buznikov & Kurlyandskaya, 2019;Rosales-Rivera et al, 2007).…”

The Study of the Distribution of Electrical and Magnetic Properties over the Conductor Cross-Section Using Magnetoimpedance Tomography: Modeling and Experiment

“…It will be possible to find an approximation of the real distribution of magnetic permeability by modeling the frequency dependences of the impedance in cylindrical conductors at different radial distributions of magnetic permeability and specific conductivity and comparing the modeled dependences with the experimental ones. In future investigations, it will be possible to take into account that the cross-section of the wires, in reality, is not strictly circular, and also to study planar MI elements, such as amorphous ribbons and multilayer films, which, in particular, can be used in the tasks of a bio-detection [ 32 , 33 ].…”