Abstract
Magnetoelectric coupling, magnetoimpedance and dielectric properties are investigated for spin–charge dependent magnetoelectric LaFeO3-poly(vinylidene fluoride) hybrid nanocomposites. The X-ray diffraction pattern indicates that both LaFeO3 and poly(vinylidene fluoride) phases coexist in the nanocomposites. The magnetoelectric coupling measurement confirms the multiferroic in nature of the nanocomposites. Magnetoelectric and magnetocapacitance (∼42%) effects are ascribing the improvement of space charge polarization of nanocomposites. The light of classical electrodynamics causes the room temperature magnetoimpedance effect (∼94%). Temperature dependent ac conductivity suggests the observation of negative temperature coefficient resistance behavior that also obeys the single Jonscher's power law. The conduction mechanism of the system is controlled through small and large polaronic hopping. Activation energy of those polymer based hybrid nanocomposites is estimated using Arrhenius relation. The magnetoelectric coupling of the nanocomposites is enhanced with an increase in poly(vinylidene fluoride) content. The inorganic-organic based nanocomposites could be a favorable candidate for improvement of magnetoelectric devices, smart energy storage and energy harvesting device applications.
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