The influence of Mn substitution on the local structure of Na0.5Bi0.5TiO3 crystals: Increased ferroelectric ordering and coexisting octahedral tilts

Abstract

The ferroelectric domain structure of pure Na1/2Bi1/2TiO3 (NBT) and 1 at.% Mn-doped NBT (Mn-NBT) crystals was investigated by piezoresponse force microscopy. The correlation length of the polar regions was found to increase upon Mn substitution. High resolution transmission electron microscopy revealed that the coherency of the lattice across the domain boundaries between polar regions was also enhanced. Selected area electron diffraction showed that Mn favored coexisting 1/2 (ooo) and 1/2 (ooe) oxygen octahedral tiltings, over only 1/2 (ooo) for pure NBT. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3699010]

Description
Keywords
Atomic force microscopy, Annealing, Crystal growth, Ferroelectric domain structure, Single crystals
Citation
Yao, Jianjun, Ge, Wenwei, Yan, Li, Reynolds, William T., Li, Jiefang, Viehland, D., Kiselev, D. A., Kholkin, A. L., Zhang, Qinhui, Luo, Haosu (2012). The influence of Mn substitution on the local structure of Na0.5Bi0.5TiO3 crystals: Increased ferroelectric ordering and coexisting octahedral tilts. Journal of Applied Physics, 111(6). doi: 10.1063/1.3699010