Yao, JianjunMonsegue, NivenMurayama, MitsuhiroLeng, W. N.Reynolds, William T. Jr.Zhang, QinhuiLuo, HaosuLi, JiefangGe, WenweiViehland, Dwight D.2014-01-212014-01-212012-01-01Yao, Jianjun; Monsegue, Niven; Murayama, Mitsuhiro; et al., "Role of coexisting tetragonal regions in the rhombohedral phase of Na0.5Bi0.5TiO3-xat.%BaTiO3 crystals on enhanced piezoelectric properties on approaching the morphotropic phase boundary," Appl. Phys. Lett. 100, 012901 (2012); http://dx.doi.org/10.1063/1.36738320003-6951http://hdl.handle.net/10919/24959The ferroelectric domain and local structures of Na0.5Bi0.5TiO3-xat.%BaTiO3 (NBT-x%BT) crystals for x = 0, 4.5, and 5.5 have been investigated by transmission electron microscopy. The results show that the size of polar nano-regions was refined with increasing xat. %BT. The tetragonal phase volume fraction, as identified by in-phase octahedral tilting, was found to be increased with BT. The findings indicate that the large electric field induced strains in morphotropic phase boundary compositions of NBT-x%BT originate not only from polarization rotation but also polarization extension. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3673832]application/pdfenIn CopyrightTransmission electron microscopyLead-free piezoceramicsSingle crystalsCeramicsDiffractionTransitionsStrainPhysicsArticle - Refereedhttp://scitation.aip.org/content/aip/journal/apl/100/1/10.1063/1.3673832https://doi.org/10.1063/1.3673832