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The Fe-doped flux-grown KTa1−xNbxO3 (KTN) with composition on the margin of the cubic phase zone has been characterized by synchrotron topography. It is shown that growth bands in flux-grown KTN are primary planar defects which lie along the [010] growth direction. A set of [100] oriented black-white fringes revealed by anomalous scattering are ascertained to be 180° ferroelectric domains, which are caused by occurrence of the partial transition in the interior of KTN. The origins of occurrence of this partial ferroelectric transition and the growth characteristics in KTN are outlined
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Hu et al. (1992) studied this question.
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