Optically tunable magnetoelectric properties of inorganic-organic multiferroic flexible film

What is it about?

The magnetoelectric composites are promising materials for their physical properties such as spontaneous electrical polarization or magnetization with an application of magnetic or electric field. In addition, the spinal ferrite based magnetoelectric composites material absorbs a range of light energy, which offers plenty of physical phenomena behind the light dependent magnetoelectric properties of the composite. The piezoelectric organic polymer based magnetoelectric composite of Zn0.2Co0.8Fe2O4 - poly(vinylidene fluoride) flexible film has been fabricated by chemical pyrophoric reaction process followed by a solution casting process. Structural and surface morphology of the composite film have been studied. The visible light and applied magnetic field dependent AC electrical properties of the composite flexible film have been investigated at room temperature. It reveals that the maximum change in impedance is found to ~10 and ~20%, respectively. However, with an influence of both the light and magnetic field, the impedance of the composite film is largely changed attributing the excited electron may get a low resistive path through the grain and grain boundaries. Where, the maximum change in impedance is found to ~30%. This result further is confirmed from the change of grain and grain boundaries resistance and capacitance through the fitting of Nyquist plots. The present work provides information about the optically and magnetically influenced the physical properties of the composite flexible film, which will be expanded for the multiferroic magnetoelectric device applications.

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Why is it important?

Light and magnetic field tuning electrical properties of Zn0.2Co0.8Fe2O4 - poly(vinylidene fluoride) flexible film having contribution of grain and grain boundaries.