Document Type
Article
Publication Date
9-7-2012
Journal or Book Title
Physical Review Letters
Volume
109
Issue
10
First Page
10760
DOI
10.1103/PhysRevLett.109.107602
Abstract
We report the first direct evidence that the morphotropic phase boundary in ferroelectric materials, along with the associated strong piezoelectricity, can be created, destroyed, or even replaced by another morphotropic phase boundary through phase transitions during electrical poling. The real-time evolution of crystal structure and domain morphology during the poling-induced phase transitions in (Bi1/2Na1/2)TiO3-BaTiO3 is observed with in situ transmission electron microscopy. These observations elucidate the microstructural origin of the macroscopic piezoelectricity’s dependence on the poling field and previously unexplained strain behaviors. This study demonstrates that the ferroelectric-to-ferroelectric transitions during the poling process can completely alter the morphotropic phase boundaries and, hence, must be comprehensively investigated when interpreting the microscopic mechanism of macroscopic piezoelectric behaviors.
Copyright Owner
American Physical Society
Copyright Date
2012
Language
en
File Format
application/pdf
Recommended Citation
Ma, Cheng; Guo, Hanzheng; Beckman, Scott P.; and Tan, Xiaoli, "Creation and Destruction of Morphotropic Phase Boundaries through Electrical Poling: A Case Study of Lead-Free (Bi1/2Na1/2)TiO3-BaTiO3 Piezoelectrics" (2012). Materials Science and Engineering Publications. 25.
https://lib.dr.iastate.edu/mse_pubs/25
Comments
This article is from Physical Review Letters 109 (2012): 107602, doi:10.1103/PhysRevLett.109.107602. Posted with permission.