resumo
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]
palavras-chave
LEAD-ZIRCONATE-TITANATE; TRANSMISSION ELECTRON-MICROSCOPY; SODIUM BISMUTH TITANATE; PHASE-TRANSITIONS; FREE PIEZOCERAMICS; SINGLE-CRYSTAL; CATIONIC VACANCIES; TETRAGONAL PHASE; RELAXOR BEHAVIOR; CERAMICS
categoria
Physics
autores
Yao, JJ; Ge, WW; Yan, L; Reynolds, WT; Li, JF; Viehland, D; Kiselev, DA; Kholkin, AL; Zhang, QH; Luo, HS
nossos autores
Andrei Kholkin
Investigador Jubiladoagradecimentos
This work was financially supported by the National Science Foundation (Materials World Network) DMR-0806592, by the Department of Energy under DE-FG02-07ER46480, by the National Science Foundation of China 50602047, by the Shanghai Municipal Government 08JC1420500, and by the Programme of Creation and Development of the National University of Science and Technology (MISiS). J. Yao also would like to thank the financial support from the China Scholarship Council. Authors also give thanks to Dr. Z. K. Xu for useful discussion and NCFL in Virginia Tech for the TEM support.