Length effect in a negative magnetostrictive Co–Si–B amorphous wire with rectangular hysteresis loop

Abstract Magnetization and coercivity profiles of Co-rich amorphous wires with negative magnetostriction have been measured for the sample lengths of 3–12 cm. Observed dependencies suggest that the critical length for Co-rich wires is around 4 cm, being much less than in Fe-rich amorphous wires. Estimations of domain wall velocity and inner axially magnetized core diameter have been made.