Abstract
Peculiar L-shaped diffuse streaks along pc were observed in (Na 0.5 Bi 0.5 )TiO 3 (NBT) below the Burns temperature, revealing the existence of polar nanoregions (PNRs). The displacement of Bi 3+ cations is ∼0.26 A along pc in the PNRs, with a size of ∼13 A in NBT. The BaTiO 3 doping drives the diffuse scattering patterns to evolve from the L-shape into an ellipsoidal along pc in (Na 0.5 Bi 0.5 )TiO 3 –x BaTiO 3 . An abnormally large correlation length was observed in the morphotropic phase boundary composition with x = 0.05.
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