Abstract

The effect of stress annealing on magnetic properties and asymmetrical giant magneto-impedance effect of Co-rich glass-covered microwires have been studied. The asymmetrical giant magneto-impedance effect in glass-covered amorphous wires was obtained frequency current biased with a dc current. Under certain annealing conditions(annealing current, Iann=183 A/mm2, applied stress, =140 MPa), the impedance up to about 0.18 % / A/m. The asymmetrical giant magneto-impedance is useful to construct linear field Sensors.

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