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

Thumbnail
View/Open
Main article (981.4Kb)
Downloads: 968
Date
2012-01-01
Author
Yao, Jianjun
Monsegue, Niven
Murayama, Mitsuhiro
Leng, W. N.
Reynolds, W. T.
Zhang, Qinhui
Luo, Haosu
Li, Jiefang
Ge, Wenwei
Viehland, Dwight D.
Metadata
Show full item record
Abstract
The 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]
URI
http://hdl.handle.net/10919/24959
Collections