Longitudinally driven giant magneto-impedance effect enhancement by magneto-mechanical resonance

Abstract Longitudinally driven giant magneto-impedance (GMI) effect in amorphous magnetostrictive Fe 24 Co 11.82 Ni 47.3 Si 1.47 B 15 ribbons was investigated. The experimental results showed that the magneto-mechanical resonance of the ribbons had significantly enhanced GMI effect. The strong magneto-mechanical coupling (MMC) interaction resulted in high MI ratio. Maximal GMI ratio of 1532% was obtained in the sample annealed at 340 °C under transverse magnetic field. The results are explained in terms of MMC and resonance of the magnetostrictive materials.