ИСТИНА

We present the computer model of the magnetodielecric effect (MDE) in magnetorheological elastomers. The effect is based on the assumption about the displacement of magnetic particles inside the elastic matrix under the external magnetic field and the formation of chain-like structures. Such displacement of metallic particles inside the elastic matrix of the sample between the planes of capacitor leads to the change of capacity, which can be considered as a change of effective dielectric permittivity of elastomer caused by magnetic field (MDE). In the model of the MDE the systems consist of around 100000 particles which are considered as isotropic and anisotropic samples varying with concentration of magnetic filler, size and space distribution of particles, elastic properties of the matrix. The influence of orientation of magnetic field and the capacitor plane was studied, the anisotropy of the effect was observed. The developed model resulted in a good qualitative agreement with experimental data obtained for Fe-based elastomers. It can be used to study these novel functional materials, analyze the features of magnetodielectric effect and predict the optimal composition of magnetorheological elastomers for further profound experimental study. The reported study was funded by RFBR and Moscow city Government according to the research project No 19-32-70027