Abstract
How ferroelectric (FE) and antiferroelectric (AFE) domains interact under an electric field is interesting, given the coexistence of FE and AFE phases in technologically important compositions. Work on AFE oxides has focused on the field-induced AFE-to-FE phase transition, though, as such a global event can be readily characterized with bulk measurements. This study employs $i\phantom{\rule{0}{0ex}}n$ $s\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}u$ transmission electron microscopy to directly reveal the local action at an FE/AFE interface. The microscopic mechanism of the depolarization-field-assisted phase transition is observed and theoretically verified, which will help in engineering the phase interface to tailor the transition for applications.
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