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- W2007603982 abstract "The dynamics of a ferromagnetic or ferroelectric system interacting with longitudinal and transverse acoustic waves are described by a sine-Gordon equation coupled to D'Alembert equations. Within the framework of this model, we study the dynamics of 2ensuremath{pi} kinks that represent domain walls in the corresponding physical systems. It is demonstrated that driven oscillations of a kink coupled to its ``shadows'' in the acoustic subsystems are governed by a non-Newtonian equation of motion. The emission of the acoustic waves accompanying the small oscillations is investigated. Next we consider a kink-antikink collision and find a threshold for annihilation of the kink-antikink pair into a breather on account of acoustic losses. In some cases, we reveal ``transparency windows'' inside the annihilation range. The acoustic losses in the kink-antikink and kink-kink collisions are also calculated when the colliding kinks are ``ultrarelativistic.'' In the kink-kink collision the losses prove to be much smaller than in the kink-antikink one. For the dc-driven damped model, we obtain the kink's velocity-drive characteristic (VDC) and demonstrate that it has sharp steplike peculiarities at the values of the velocity equal to sound velocities, so that the VDC is hysteretic." @default.
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- W2007603982 date "1990-11-01" @default.
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- W2007603982 title "Dynamics of domain walls in elastic ferromagnets and ferroelectrics" @default.
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- W2007603982 doi "https://doi.org/10.1103/physrevb.42.8561" @default.
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