Longitudinal, transverse, and perpendicular magnetoimpedance in nearly zero magnetostrictive amorphous alloys

Giant magnetoimpedance effects at 100 kHz in three measuring geometries (longitudinal, transverse, and perpendicular) on amorphous Co70.4{Fe}4.6Si₁₅{B}₁₀$, subjected to different field annealings are described. For suitably annealed samples, rich peak features have been observed in longitudinal and perpendicular, but not in transverse, measurements. The results can be understood in terms of the effects of the magnetic annealing and measurement geometries on the effective differential susceptibility of the material.