Figure 1: Polarization switching via in situ TEM. | Nature Communications

Figure 1: Polarization switching via in situ TEM.

From: Revealing the role of defects in ferroelectric switching with atomic resolution

Figure 1

(a) Schematic of the formation of a downward polarized (P[00[macr1]]) region within an upward polarized (P[001]) film cross-section by the application of a local electric field via a surface probe. The polarization results from the offset of the oxygen octahedra to the Zr/Ti and Pb cations forming an electric dipole, which reorients upon switching. (b) A dark-field TEM image of alternating P[00[macr1]] and P[001] domains produced in a 100-nm PZT film by in situ electrical switching. Scale bar, 100 nm. (c) A high-resolution high-angle annular dark-field image of the domain wall bordering a switched domain and the corresponding map of the polarization direction determined by the relative offset of the Zr/Ti atoms, confirming a 180° rotation. Scale bar, 1 nm.

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