Polymer-based magnetoelectric composite materials have attracted a lot of attention due to their high potential in various types of applications as magnetic field sensors, energy harvesting, and biomedical devices. Current researches are focused on the increase in the efficiency of magnetoelectric transformation. In this work, a new strategy of arrangement of clusters of magnetic nanoparticles by an external magnetic field in PVDF and PFVD-TrFE matrixes is proposed to increase the voltage coefficient (αME) of the magnetoelectric effect. Another strategy is the use of 3-component composites through the inclusion of piezoelectric BaTiO3 particles. Developed strategies allow us to increase the αME value from ~5 mV/cm·Oe for the composite of randomly distributed CoFe2O4 nanoparticles in PVDF matrix to ~18.5 mV/cm·Oe for a composite of magnetic particles in PVDF-TrFE matrix with 5%wt of piezoelectric particles. The applicability of such materials as bioactive surface is demonstrated on neural crest stem cell cultures.

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Among many materials considered for use in domain-wall nanoelectronics, lithium niobate (LiNbO3, LN) is one of the most technological and physically stable. Compared with many other reports where inclined domain...

Halide perovskites have demonstrated great potential for photovoltaics and detector applications, due to the strong absorption, large mobility lifetime product, structural defect tolerance, and wide range of chemical compositions with...

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Dielectric response of vinylidene fluoride‐hexafluoropropylene copolymer, crystallized in different polymorph modifications, to a high‐voltage electric field was studied. Polarization switching at high electric fields below coercive was detected. It was found that crystallization of the copolymer predominantly in nonpolar α‐phase is accompanied by more intensive growth of electric displacement at polarization. For the sample with higher content of polar γ‐phase, the value of high‐voltage conductivity “anomalously” decreased with increasing field at fields above coercive. The data on the field dependences of the remnant polarization showed that this should be attributed to an increase of the effective capture cross section of deep traps of γ‐phase polar planes for impurity and injected carriers. X‐ray diffraction has revealed the field‐induced transition of a part of the chains of the amorphous phase to the crystal.