Structure and ferroelectricity of nonstoichiometric (Na0.5Bi0.5)TiO3

Jared Carter, Elena Aksel, Thanakorn Iamsasri, Jennifer S. Forrester, Jun Chen, Jacob L. Jones
2014 Applied Physics Letters  
The ferroelectric domain structure of pure Na 1/2 Bi 1/2 TiO 3 (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
more » ... g 1/2 (ooo) and 1/2 (ooe) oxygen octahedral tiltings, over only 1/2 (ooo) for pure NBT. V C 2012 American Institute of Physics. [http://dx.
doi:10.1063/1.4868109 fatcat:sttv42y4i5carm4kh3zlnrkvwu