Induced magneto-electric coupling at ferroelectric/ferromagnetic interface

Abstract

We have demonstrated that at room temperature the electric polarization of a ferroelectric polymer, polyvinylidene fluoride (PVDF), in an artificial multiferroic structure can be controlled by applying an external magnetic field. We found that as the applied magnetic field is changed, the switching of electric polarization for the PVDF depends on the external magnetic field. We also noticed that both the electric coercivity and polarization of the PVDF polymer display hysteretic features as the applied magnetic field is changed. We found that the thickness of the PVDF layer has an effect on the magnetoelectric coupling strength in our samples. The coupling sensitivity increases as the PVDF layer thickness increases. It is possible to control the ferroelectric properties of a PVDF film by tuning the external magnetic field.

Optimization of the Magnetoelectric Response of Poly(vinylidene fluoride)/Epoxy/Vitrovac Laminates

“…As previously reported, Figure 4 shows that the ME response of PVDF-based ME-laminated composites increases with increasing thickness of the PVDF layer. 44 Nevertheless, an increase of 300% in the thickness of PVDF (from 28 to 110 μm) has, as a consequence, just an increase of 20% in the ME response (from 45 to 53 V•cm −1 •Oe −1 ).…”

Local probing of magnetoelectric properties of PVDF/Fe3O4electrospun nanofibers by piezoresponse force microscopy

“…Strain coupling induced ME effects have given rise to extraordinary ME properties, particularly in the polymerbased composites that combine the piezoelectric polyvinylidene fluoride (PVDF) with magnetostrictive materials such as Terfenol-D or metglas. This has led to the generation of ME coefficients of up to 370 V cm −1 Oe −1 [10] under an externally applied magnetic field, thus making these ME composites promising candidates for a wide range of device applications [4,11,12].…”