Ferroelectric and magnetic studies on unpoled Poly (vinylidine Fluoride)/Fe3O4 magnetoelectric nanocomposite structures

The fabrication of flexible Poly (vinylidine Fluoride)/Fe₃O₄ magnetoelectric nanocomposite films with different weight fractions of Fe₃O₄ nanoparticles is explained in this paper. The effects of nano Fe₃O₄ content on the structural, chemical, thermal, and magnetoelectric properties of PVDF matrix are discussed. XRD and FTIR results reveal the interaction between the filler and the matrix and also they suggest that the β phase contribution can be significantly controlled by the inclusion of nano Fe₃O₄. Thermal stability and melting point behavior of the composite films are investigated through TG/DTA. The existence of ferrimagnetism and ferroelectric properties in the films are proved through the magnetization and polarization studies. The hysteresis loops show the largest polarization and magnetization values at 0.14 wt% of Fe₃O₄. Also, the dependence of ferroelectric polarization on temperature is investigated and reported.