Modelling the effect of particle arrangement on the magnetoelectric response of a polymer multiferroic film

Столбов, О. В.; Ignatov, A. I.; Rodionova, Valeria; Raǐkher, Yu. L.

doi:10.1039/d3sm00275f

Cited by 2 publications

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“…Therefore, in a magnetoactive composite, the origin of the electric signal is the same as in the magnetostrictive one, but the origin of the stress is different. As we have shown [ 19 ], the ME effect in a three-component magnetoactive composite but weakly depends on the elastic modulus of the matrix, so the latter might be varied in a wide range. On the other hand, the properties of three-component composites strongly depend on the mutual positions of the FM and PE particles.…”

Section: Introductionmentioning

confidence: 99%

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Magnetostrictive and Magnetoactive Effects in Piezoelectric Polymer Composites

Stolbov,

Raikher

2023

Nanomaterials

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A mesoscopic model for a polymer-based magnetoelectric (ME) composite film is developed. The film is assumed to consist of a piezoelectric polymer matrix of the PVDF type filled with CFO-like single-domain nanoparticles. The model is treated numerically and enables one to obtain in detail the intrinsic distributions of mechanical stress, polarization and electric potential and helps to understand the influence of the main configurational parameters, viz., the poling direction and the orientational order of the particle magnetic anisotropy axes on the electric response of the film. As the model is fairly simple—it uses the RVE-like (Representative Volume Element) approach with a single-particle cell—the results obtained are rather of qualitative than quantitative nature. However, the general conclusions seem to be independent of the particularities of the model. Namely, the presented results establish that the customary ME effect in composite films always comprises at least two contributions of different origins, viz., the magnetostrictive and the magnetoactive (magnetorotational) ones. The relative proportion between those contributions is quite movable depending on the striction coefficient of the particles and the stiffness of the polymer matrix. This points out the necessity to explicitly take into account the magnetoactive contribution when modeling the ME response of composite films and when interpreting the measurements on those objects.

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Section: Introductionmentioning

confidence: 99%

“…A short discussion of that notable work and the essence of the effect discovered there might be found in Ref. [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetostrictive and Magnetoactive Effects in Piezoelectric Polymer Composites

Stolbov,

Raikher

2023

Nanomaterials

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Нефарадеевское Магнитоэлектричество В Контексте Мезомеханики

Столбов,

Райхер

2024

Perm Sci. Cent. J.

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The paper outlines the physical basis of magnetoelectric conversion by means of the piezoelectric effect. The whole class of materials capable of such conversion is termed as multiferroics. An important group of those make composite media in which the ferromagnetic (or ferrimagnetic) and piezoelectric components dwell in close contact. The magnetic field, acting on the ferromagnet arises internal mechanical stresses via it, which are perceived by the other phase of the composite and launches the piezoelectric effect in it, i.e. makes the sample a source of potential difference. Whereas the ferromagnetic phase is always a solid substance, the piezophase can be not only a solid but also a polymer, and this expands considerably the application prospects of such convertors. Fundamental analysis shows that in a polymeric composite, ferromagnet particles under the action of an external field excite the piezoeffect in two ways simultaneously: through magnetostriction (change of the particle shape) and through a mechanical displacement of the particle body. Although these two methods are, in principle, independent, in a ferrite-polymer composite they always coexist, and under a given set of conditions their joint action might either enhance or reduce the conversion ef ficiency. This general conclusion is illustrated by the results of numerical modelling of the magnetoelectric effect in a composite film whose content mimics one of the currently best known polymer multiferroics: the dispersion of cobalt ferrite particles in a matrix of polyvinylidene fluoride (CFO-PVDF).

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Modelling the effect of particle arrangement on the magnetoelectric response of a polymer multiferroic film

Abstract: In this work the behavior of a three-component composite multiferroic (MF)—an electrically-neutral polymer matrix filled with a mixture of piezoelectric and ferromagnetic micron-size particles—is investigated in the framework of a...

Cited by 2 publications

References 41 publications

Magnetostrictive and Magnetoactive Effects in Piezoelectric Polymer Composites

Magnetostrictive and Magnetoactive Effects in Piezoelectric Polymer Composites

Нефарадеевское Магнитоэлектричество В Контексте Мезомеханики

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