Measuring magneto-impedance in ferromagnetic wires subjected to external stimuli such as magnetic field, tensile stress, and temperature
See the report in the file "Report_Multi-stage calibration for impedance measurements.pdf".
SUMMARY
This project focuses on measuring surface impedance in ferromagnetic wires, a crucial aspect in developing materials with specific microwave properties for applications in sensors and metamaterials. We present a broadband impedance measurement technique operational up to 15 GHz, designed to simplify the characterization of ferromagnetic microwires, which exhibit unique magnetic and conductive behaviors influencing electromagnetic scattering. We develop customized printed circuit board (PCB) cells and a multi-stage calibration process that enables flexibility in testing under different external stimuli, such as magnetic fields, temperature, and mechanical stress.
KEY CONTRIBUTIONS
Broadband Measurement Technique: Establishes a method for accurate impedance measurements up to 15 GHz, crucial for analyzing microwire-based composites.
PCB Calibration Cells: Develops PCB cells for precise impedance measurements, accounting for factors like temperature and mechanical stress.
Numerical Simulation Compatibility: Enables use of experimentally derived impedance values in computational simulations, supporting advanced material design.