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Non-Ising-like 180° ferroelectric domain wall architecture and domain distribution in tetragonal PbZrxTi1−xO3 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.
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Luca et al. (2016) studied this question.
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