The Study of Magnetoimpedance Effect for Magnetoelectric Laminate Composites with Different Magnetostrictive Layers

The rectangular magnetoelectric (ME) composites of Metglas/PZT and Terfenol-D/PZT are prepared, and the effects of a magnetostrictive layer's material characteristics on the magnetoimpedance of ME composite are discussed and experimentally investigated. The theoretical analyses show that the impedance is not only dependent on Young's modulus and the magnetostrictive strain of magnetostrictive material but is also influenced by its relative permeability. Compared with Terfenol-D, Metglas possesses significantly higher magnetic permeability and larger magnetostrictive strain at quite low H-dc due to the small saturation field, resulting in the larger magnetoimpedance ratio. The experimental results demonstrate that the maximum magnetoimpedance ratios (i.e., & UDelta;Z/Z) of Metglas/PZT composite are about 605.24% and 239.98% at the antiresonance and resonance, respectively. Specifically, the maximum & UDelta;Z/Z of Metglas/PZT is 8.6 times as high as that of Terfenol-D/PZT at the antiresonance. Such results provide the fundamental guidance in the design and fabrication of novel multifunction devices based on the magnetoimpedance effect of ME composites.

Automated summary

The rectangular magnetoelectric (ME) composites of Metglas/PZT and Terfenol-D/PZT were prepared and the effects of magnetostrictive layer materials on the magnetoimpedance of the ME composite were discussed. Theoretical analyses showed that impedance is dependent on material characteristics such as Young's modulus, magnetic permeability, and magnetostrictive strain. Experimental results demonstrated that the Metglas/PZT composite exhibited significantly higher magnetoimpedance ratios compared to the Terfenol-D/PZT composite. These findings provide fundamental guidance for the design and fabrication of novel multifunction devices based on the magnetoimpedance effect of ME composites.