Abstract
The elastic response of BaTiO3 single crystals during electric field cycling at room temperature has been studied using in situ Resonant Ultrasound Spectroscopy (RUS), which allows monitoring of both the elastic and anelastic changes caused by ferroelectric polarization switching. We find that the first ferroelectric switching of a virgin single crystal is dominated by ferroelastic 90° switching. In subsequent ferroelectric switching, ferroelastic switching is reduced by domain pinning and by the predominance of 180° ferroelectric domains, as confirmed by polarized light microscopy. RUS under in situ electric field therefore demonstrates to be an effective technique for the investigation of electromechanical coupling in ferroelectrics.
Highlights
Understanding the role of the domain structure on ferroelectric switching is of high technological relevance for the optimization of devices based on ferroelectric crystals
Resonant Ultrasound Spectroscopy (RUS) has proved to be an effective tool for identifying thermally driven energy dissipation associated with the existence of polar nanoregions in BaTiO327 and relaxors,28,29 but the elastic and anelastic responses under in situ electrical cycling remain unexplored
We show scitation.org/journal/apm that this technique allows for the identification of strain and energy dissipation caused by ferroelectric switching processes
Summary
Understanding the role of the domain structure on ferroelectric switching is of high technological relevance for the optimization of devices based on ferroelectric crystals.
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