Role of coexisting tetragonal regions in the rhombohedral phase of Na 0.5Bi 0.5TiO 3-xat.BaTiO 3 crystals on enhanced piezoelectric properties on approaching the morphotropic phase boundary

Jianjun Yao, Niven Monsegue, Mitsuhiro Murayama, Weinan Leng, William T. Reynolds, Qinhui Zhang, Haosu Luo, Jiefang Li, Wenwei Ge, D. Viehland

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56 Citations (Scopus)

Abstract

The ferroelectric domain and local structures of Na 0.5Bi 0.5TiO 3-xat.%BaTiO 3 (NBT-xBT) 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-xBT originate not only from polarization rotation but also polarization extension.

Original languageEnglish
Article number012901
JournalApplied Physics Letters
Volume100
Issue number1
DOIs
Publication statusPublished - Jan 2 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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