Electrodeposited NiFe based composite wire has significant advantages over amorphous wire as sensing element for weak magnetic field sensors due to its non-ferromagnetic and conductive core structure. The field and frequency dependences of total impedance and its real part were comparatively analyzed together with magnetization processes features. The maximum GMI ratio depends strongly on the heat treatments. Detailed analysis of the MI responses indicates the existence of two different types of spin-reorientation phase transitions, which are strongly connected to magnetic anisotropy formed during field annealing. The weak dependence of ΔZ/Z ratio in the case of AC field annealed samples in the high frequency range is an important advantage for particular sensor applications. In the present talk, am going to discuss about the effect of field annealing (AC and DC) on magnetic properties and giant magnetoimpedance (GMI) of NiFe based alloys which is deposited on CuBe.