Formation of polarization needle-like domain and its unusual switching in compositionally graded ferroelectric thin films: an improved phase field model.

ABSTRACT: Compositionally graded ferroelectrics (cgFEs), which possess a spatial variation in material composition, exhibit anomalous or even unprecedented properties. Despite several breakthroughs having been achieved in experiments, there surprisingly is a lack of an effective simulation approach for cgFEs, thereby greatly hindering a deep understanding about underlying mechanisms hidden behind the observed phenomena. In this study, an improved phase field model is proposed for a cgFE made of PbZr_(1-x)Ti _x O₃ based on the Ginzburg-Landau theory. The improved approach enables us to capture several key phenomena occurring in the cgFE PbZr_0.8Ti_0.2O₃ ⇔ PbZr_0.2Ti_0.8O₃ thin film that are obse

SUBMITTER: Van Lich L 

PROVIDER: S-EPMC9061203 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature