Magnetic, dielectric and magnetodielectric properties of PVDF-La0.7Sr0.3MnO3 polymer nanocomposite film

Abstract

We have investigated the structure, magnetic and dielectric properties of PVDFLa 0.7 Sr 0.3 MnO 3 polymer nanocomposite thick film fabricated by dip coating technique along with the magnetodielectric effect. The structure and dielectric properties show the enhanced β phase in the composite compared to the PVDF film. The coupling between the ferroelectric and magnetic phases in the composite is revealed in the form of dielectric anomaly at the ferromagnetic Curie temperature. We observed 1.9% magnetodielectric effect at 300 K with the possibility of enhanced effect near the transition temperature. In addition, the analysis of the electric modulus indicates that the composite exhibits interfacial related relaxation and it follows Arrhenius Law. Our study suggests that the ac conductivity of the PVDF-La 0.

Magneto-dielectric coupling and transport properties of the ferromagnetic-BaTiO3 composites

“…This correspondence is attributed to the magnetoelectric coupling and has been reported in single phase, solid solutions, and composite systems. 1,6,[17][18][19] The enhanced relaxor ferroelectric behavior mimicked from dielectric parameters at ferromagnetic-paramagnetic transition temperature confirms the multiferroic magnetoelectric nature of the LSMO-BTO nanocomposites.…”

Fabrication of flexible and self-standing inorganic–organic three phase magneto-dielectric PVDF based multiferroic nanocomposite films through a small loading of graphene oxide (GO) and Fe3O4nanoparticles

“…However, studies on polymer based multiferroic or functional composites having reasonable magnetic, ferroelectric, and dielectric responses with low dielectric loss and MD coupling are mostly centered on two phase materials, [32][33][34] except for a few isolated reports on three phase (ternary) composites. [35][36][37][38] Guo et al 32 prepared the 0-3Ni 0.5 Zn 0.5 Fe 2 O 4 (NZFO)-PVDF composite films with low dielectric loss, and giant magneto-dielectric coupling effect.…”

Clarification of the Magnetocapacitance Mechanism for Fe3O4‐PDMS Nanocomposites

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“…Materials with magnetocapacitance effect are promising for advanced applications in magnetic field sensors, data storage, and microwave communication devices [1][2][3]. Currently, main attention has been paid to the magnetocapacitance composites with magnetoelectric coupling, which consist of piezoelectric phase and piezomagnetic or magnetostrictive phase, such as CFMO-PBT, CFO-KNN, and Terfenol-D-PZT [4][5][6][7][8][9]. Recently, magnetocapacitance nanocomposites without magnetoelectric coupling composed of magnetic nanoparticles and polymer have also been reported [10,11].…”