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It is shown that a surprising variety of microstructural phenomena in ferroelectric materials are accessible by high-resolution electron microscopic techniques. Recent observations are reviewed concerning (i) domain wall widths and surface roughness in LiTaO3, KNbO3 and barium sodium niobate (BNN); (ii) microdomain textures and fluctuations at the cubic/tetragonal phase transition of BaTiO3; (iii) the commensurate superlattice structure of BNN and (iv) the hierarchy of chaotic states coexisting within the incommensurate superstructure phase of strontium barium niobate (SBN) at room temperature.
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Bursill et al. (1986) studied this question.
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