Magnetic microwires for orthogonal fluxgates electroplated with pulse current

AbstractIn this contribution we present magnetic microwires electroplated with pulse current (PC), used as core for orthogonal fluxgate. We fabricated microwires with different duty cycle, and we studied their magnetic properties as well as their behaviour when employed for orthogonal fluxgate. We observed that the noise at 1 Hz is minimum when a duty cycle between 60% and 80% is used, whereas it increases for lower duty cycle and microwires electroplated with direct current (DC). On the other hand, wires realized with low duty cycle show much wider linear range than those realized with high duty cycle. Thus, we derive that high duty cycle must be preferred if the orthogonal fluxgate is used in feedback mode (because of the lower noise), whereas for some low-end applications when the sensor is used in open loop we prefer wires electroplated with lower duty cycle (because of the wider linear range)