Domain Wall Architecture in Tetragonal Ferroelectric Thin Films.

De Luca, Gabriele; Rossell, Marta D; Schaab, Jakob; Viart, Nathalie; Fiebig, Manfred; Trassin, Morgan · Adv Mater · 2017

basic_science · Level V

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Abstract

Non-Ising-like 180° ferroelectric domain wall architecture and domain distribution in tetragonal PbZr<sub>x</sub> Ti<sub>1-</sub><sub>x</sub> O<sub>3</sub> thin films are probed using a combination of optical second harmonic generation and scanning transmission electron microscopy. In the remnant state, a specific nonlinear optical signature of tilted 180° domain walls corresponding to a mixed Ising-Néel-type rotation of polarization across the wall is shown.