Interfacial bonding effect on nonlinear magnetoelectric response of multiferroic composites

Low-Frequency and High-Sensitivity PVDF/Metglas Magnetoelectric Sensor Based on Bending Vibration Mode

“…This enhancement can be attributed to the reduction in total thickness observed in the treated samples, along with a decrease in the stiffness of the entire laminate structure . As magnetostrictive/piezoelectric laminate composites rely on a two-dimensional stress/strain transfer interface for strong ME coupling, the notable increase in the ME voltage coefficient can be attributed to the further improvement in coupling between the magnetostrictive and piezoelectric layers. − The variation trends of the ME voltage coefficient for all samples with respect to the DC bias magnetic field are depicted in Figure c,d. To observe the patterns more effectively, the values of the two resonance frequencies and the optimal DC bias magnetic field from Figure a–d are summarized in Figure f.…”

“…The structure of ME composites plays a crucial role in determining the ME properties. The adhesive layer between the magnetostrictive and piezoelectric phases significantly impacts the strain transfer and interface coupling. , Consequently, a thinner intermediate bonding layer leads to higher ME response in ME composites. − In the case of ME magnetic sensors using materials such as PZT and other rigid blocks, the design typically involves slender strips, and vacuum packaging technology is usually avoided during the bonding process due to the risk of breakage. However, PVDF and Metglas, as flexible materials, can be safely treated with vacuum packaging without causing any damage to the samples.…”