Electroacoustic waves of a moving domain wall superlattice in a ferroelectric crystal

Electroacoustic Waves in a Ferroelectric Crystal with of a Moving System of Domain Walls

“…Thus, it is expedient to generalize the results of the research of acoustic properties of static superlattices of ferroelectric to the case of dynamic superlattices whose distinctive feature is adjustable moving domain boundaries. Below, on the basis of our works [Vilkov, 2008;Vilkov, 2009;Vilkov et al, 2009] the propagation of guided EIWs and bulk electrosound waves in a dynamic superlattice of equidistant uniformly moving 180-degree DW is considered. Let's notice, that until now the research of acoustic effects in crystals of ferroelectrics with moving DW was limited to cases of noncollective acousto-domain interactions:a single DW [Shevyakhov, 1990;Gulyaev et al, 2000], a strip domain (i.e., a pair of DWs) [El'meshkin & Shevyakhov, 2006] and a structure of a two adjacent strip domains [Bugaev et al, 2005].…”