Magnetization reversal process and nonlinear magnetoimpedance in multilayered films

The AC current induced magnetization reversal of a three-layered film structure consisting of soft magnetic outer layers and a nonmagnetic inner layer is studied. The frequency spectrum of the voltage induced in the pick-up coil wound around the sample is analyzed. A high sensitivity of the voltage response to an external DC magnetic field is demonstrated. The results obtained may be of importance for the design of miniature sensors of a weak magnetic field