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- Title
Types and configurations of domain walls in ferroelectric Bi<sub>4</sub>Ti<sub>3</sub>O<sub>12</sub> single crystals.
- Authors
Ye, Wanneng; Lu, Chaojing; Zhang, Yongcheng; Zhou, Yichun
- Abstract
In the ferroelectric Bi4Ti3O12, the major component Ps( a) of spontaneous polarization Ps lies along the a axis; the component Ps( c) along the c axis is small. The two switchable components are expected to make up various types of domain walls (DWs). According to group-theory analysis, 11 permissible types of DWs are predicted to exist theoretically, and they include five types of ferroelectric DWs, one type of anti-phase boundary (APB) and five types of APB-combined ferroelectric DWs. The five types of ferroelectric DWs are Ps( a)-90° DWs, Ps( a)-180° DWs, Ps( c)-180° DWs, Ps( a)-90°/ Ps( c)-180° DWs and Ps-180° DWs. In Bi4Ti3O12 single crystals, just the five types of ferroelectric DWs were observed using transmission electron microscopy, with no trace of APBs or APB-combined ferroelectric DWs seen. The Ps( a)-90° domains are lamellar and do not have even thickness. Both the Ps( a)-90° DWs and Ps( a)-90°/ Ps( c)-180° DWs lie mainly on the (110) plane, but often fold to the (001) plane. The Ps( a)-180° domains are predominantly flaky. Both the Ps( a)-180° DWs and Ps-180° DWs lie mainly on the (001) plane. The Ps( c)-180° DWs observed are irregularly curved.
- Subjects
DOMAIN walls (Ferromagnetism); FERROELECTRIC crystals; SINGLE crystals; POLARIZATION (Electricity); ANTIPHASE boundaries
- Publication
Journal of Applied Crystallography, 2015, Vol 48, Issue 4, p1080
- ISSN
0021-8898
- Publication type
Article
- DOI
10.1107/S1600576715010924