Abstract
Abstract Investigation of ferroelectric domain structure in β-LAS single crystals showed strong influence of sample's thermal history on it's pattern. The only orientation of domain walls for β-LAS samples “as grown” and after ferroelastic-ferroelectric phase transition is crystallographic direction [100]. Following paraelectric-ferroelectric phase transition two other orientations of domain walls appear: [302] and [30]. It was observed that above mentioned directions correspond to two orientations of “domain texture” found in very narrow temperature range ΔT ∼ 1 deg below Curie temperature (Tc = 462 K). Switching process in β-LAS single crystals in (ac) plane spreads along direction [100] irrespective of ferroelectric domain structure pattern.
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