Optimizing piezoelectric and magnetoelectric responses on CoFe₂O₄/P(VDF-TrFE) nanocomposites

Magnetoelectric nanocomposite films composed of magnetostrictive CoFe2O4 nanoparticles sizes between 35 and 55 nm embedded in P(VDF-TrFE) have been successfully prepared a solvent casting method. The ferroelectric, piezoelectric, magnetic and magnetoelectric of the nanocomposite and their variation with the wt% of the ferrite filler, thickness the composite and direction of the applied magnetic field have been investigated. and piezoelectric properties are improved when small amount of ferrite were added to the polymeric matrix. Magnetic properties vary linearity with content. The highest magnetoelectric response of 41.3 mV/cmOe was found in the with 72wt% when a 2.5 kOe DC field was transversely applied to the sample surface. value is among the highest reported in two phase particulate polymer nanocomposites. of the composite has no influence in the magnetoelectric response, allowing tailoring thickness for specific applications. The good value of the magnetoelectric coefficient and flexibility of the films make these composites suitable for applications in magnetoelectric devices.