Dipolar-biased giant magnetoimpedance

The effect of the dipolar field on the magnetoimpedance in Fe- and Co-based wires is presented. In the experiments a Co-based wire was used as a probe to measure the giant magnetoimpedance (GMI), while a Fe-based wire was employed to generate the dipolar field. The GMI curve showed a shift in the anisotropy field and a highly asymmetric profile. The dipole-dipole interaction can be employed to design novel linear GMI sensors and to properly tune their field operation.