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On the nonlinear dynamics of electro-magnon excitations in the BaTiO3/Fe nanostructured multiferroic composite material

We study the motion of an electric excitation between the ferroelectric (FE) and the ferromagnetic (FM) components of a MultiFerroic (MF) composite material by analysing the transfer of energy from the FE side to the FM one. The transmission process of the electric excitation, which has an envelope soliton shape, is studied for a one-dimensional model of the barium titanate/iron (BaTiO3/Fe) composite. From the transmission spectrum, we determine the most favourable range of the values of the amplitude and of the width of the initial excitation for the transmission of the FE energy to the FM part of the MF material. From the numerical analysis, it is shown that the position in which we excite the FE component strongly impacts on the solitary wave dynamics. We have also realised that, for some initial positions and suitable range of values of the amplitude and width of the excitation of the polarization, we get a stationary localised magnetic excitation in the FM part of the MF material that lasts for a long time. Such a phenomenon, which originates from a curvilinear trajectory of the incoming excitation is promising enough for the implementation of non-volatile memories based on MF composite materials.