Enhanced performance of magnetoelectric laminated composites by geometry engineering for high frequency applications

Low-Frequency Resonant Magnetoelectric Effect in a Piezopolymer-Magnetoactive Elastomer Layered Structure at Different Magnetization Geometries

“…Flexible structures have low values of Young's moduli, which makes it feasible to reduce their frequencies of bending vibrations to tens of Hz-units of kHz [21][22][23][24][25][26]. This frequency range is promising for the design of biomedical devices, energy harvesters, and magnetic field sensors [22][23][24][25][26]. To the best of our knowledge, the lowest resonance frequency of 27.8 Hz was recorded for the PVDF-Metglas structure [21].…”

“…These composites can be prepared for different shapes and geometries and can be biocompatible. One of the highest values of the ME coefficient was established for a PVDF-TrFE/Metglas laminated structure (850 V/(cm•Oe)) [21] that can be applied in magnetic sensing and energy harvesting devices [22][23][24][25].…”

“…The most pronounced magnetoelectric effect is exhibited at a resonance frequency. Depending on the different applications, the resonant frequency is of interest [1,2,[22][23][24][25][26]. Its value depends on the dimensions of the composite structure as much as on its mechanical properties [27].…”

“…Its value depends on the dimensions of the composite structure as much as on its mechanical properties [27]. Flexible structures have low values of Young's moduli, which makes it feasible to reduce their frequencies of bending vibrations to tens of Hz-units of kHz [21][22][23][24][25][26]. This frequency range is promising for the design of biomedical devices, energy harvesters, and magnetic field sensors [22][23][24][25][26].…”

Epoxy-free fabrication techniques for layered/2-2 magnetoelectric composite: a review

“…The most prevalent form in layered configuration have been bilayers, trilayers, or multilayers of magnetostrictive and piezoelectric constituents, wherein these constituents take either square or plate-shaped [45], rectangular or beam shaped [46], disc-shaped [47], ring-shaped [48] or cylindrical shaped [49] geometries. Along with these commonly used structures, certain other distinct geometries such as 'A-shaped [50], dumb-bell shaped [51], triangle-shaped, and rhombus-shaped layered composites [52] have also been fabricated. In all of the above-mentioned structures, the strain transfer between the magnetostrictive and piezoelectric phases is via shear mode.…”