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

Abstract

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.