fig4
Figure 4. (A) A STEM-HAADF image superimposed by δPb map (yellow arrows) showing the ferroelectric phase observed in PZO ultrathin film (12 nm). (B) GPA of in-plane strain (εxx) map of HAADF image in (A). (C) FFT of the PZO layer in (A). (D) An iDPC image showing the oxygen positions in the ferroelectric phase observed in PZO ultrathin films. A ferroelectric unit cell is outlined in panel (D).
