Tunable characteristics of bending resonance frequency in magnetoelectric laminated composites

As magnetoelectric (ME) effect in the piezoelectric/magnetostrictive laminated composites is mediated by mechanical deformation, the ME effect is significantly enhanced in the vicinity of resonance frequency. The bending resonance frequency (f_r) of bilayered Terfenol-D/PZT (MP) laminated composites is studied, and our analysis predicts that (i) the bending resonance frequency of MP laminated composite can be tuned by an applied dc magnetic bias (H_dc) due to Δ E effect; (ii) the bending resonance frequency of the MP laminated composite can be controlled by incorporating FeCuNbSiB layers with different thicknesses. The experimental results show that with H_dc increasing from 0 Oe (1 Oe=79.5775 A/m) to 700 Oe, the bending resonance frequency can be shifted in a range of 32.68 kHz ≤qslant f_r ≤qslant 33.96 kHz. In addition, with the thickness of FeCuNbSiB layer increasing from 0 μm to 90 μm, the bending resonance frequency of the MP laminated composite gradually increases from 33.66 kHz to 39.18 kHz. This study offers the means by adjusting the strength of dc magnetic bias or the thicknesses of FeCuNbSiB layer to tune the bending resonance frequency for ME composite, which plays a guiding role in the ME composites design for real applications.