Optimized Voltage-Induced Control of Magnetic Domain-Wall Propagation in Hybrid Piezoelectric/Magnetostrictive Devices

A theory of voltage-induced control magnetic domain walls propagating along the major axis a magnetostrictive nanostrip, tightly coupled with ceramic piezoelectric, is developed in framework Landau–Lifshitz–Gilbert equation. It assumed that strains undergone by piezoelectric actuator, subject to an electric field generated dc bias voltage applied through couple lateral electrodes, are fully transferred layer. Taking into account these piezo-induced and considering linear elastic material belonging cubic crystal class, magnetoelastic analytically determined. Therefore, using classical traveling-wave formalism, explicit expressions most important features characterizing two dynamical regimes domain-wall propagation have been deduced, their dependence on strength has highlighted. Moreover, some strategies optimize such control, based choice orientation dielectric poling respect reference axes, proposed.