Longitudinally Driven Magneto-impedance Effect on Glass-covered Fe-based Nanocrystalline Microwires

Amorphous Fe73.0Cu1.0Nb1.5 V2.0Si13.5B9.0 microwires were prepared by glass-coated melt-spinning technique. Nanocrystalline samples were obtained by annealing the amorphous wires at appropriate temperatures and the longitudinally driven giant magneto-impedance effect has also been investigated for the first time. The result showed that the maximal magneto-impedance value was 1020% obtained in the sample annealed at 570℃.