Modeling the Matteucci Effect in Non-uniform DC Magnetic Field Sensor

T. Charubina, R. Szewczykb, M. Nowickic aInstitute of Metrology and Biomedical Engineering, Warsaw University of Technology, św A. Boboli 8, 02-525 Warsaw, Poland bIndustrial Research Institute for Automation and Measurements PIAP Łukasiewicz Research Network, al. Jerozolimskie 202, 02-486 Warsaw, Poland cDepartment of Mechatronics, Robotics and Digital Manufacturing, Faculty of Mechanics, Vilnius Gediminas Technical University, Plytinės g. 25, LT-10105 Vilnius, Lithuania

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This paper presents a quantitative model for magnetic field sensors based on the Matteucci effect in non-uniform magnetic fields. The Matteucci effect, observed in twisted amorphous wires, generates voltage pulses due to magnetization changes. The model describes non-uniformities by analyzing the effect of spatial gradients in the magnetic field and enables magnetic field gradient measurement. Experimental validation shows that the field gradient introduces an additional delay in re-magnetization, reflected as distinct forked voltage pulses. The proposed model allows for the improvement of sensor performance and extends the application of Matteucci-effect-based sensors to magnetic field mapping and non-destructive testing.

DOI:10.12693/APhysPolA.146.606 topics: Matteucci effect (ME), magnetic field sensor