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- Title
Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO<sub>3</sub> films.
- Authors
Tang, Y. L.; Zhu, Y. L.; Wang, Y. J.; Wang, W. Y.; Xu, Y. B.; Ren, W. J.; Zhang, Z. D.; Ma, X. L.
- Abstract
The atomic-scale structural and electric parameters of the 90° domain-walls in tetragonal ferroelectrics are of technological importance for exploring the ferroelectric switching behaviors and various domain-wall-related novel functions. Wehave grown epitaxial PbTiO3/SrTiO3 multilayer films in which the electric dipoles at 906 domain-walls of ferroelectric PbTiO3 are characterized by means of aberration-corrected scanning transmission electron microscopy. Besides the well-accepted head-to-tail 90° uncharged domain-walls, we have identified not only head-to-head positively charged but also tail-to-tail negatively charged domain-walls. The widths, polarization distributions, and strains across these charged domain-walls are mapped quantitatively at atomic scale, where remarkable difference between these domain-walls is presented. This study is expected to provide fundamental information for understanding numerous novel domain-wall phenomena in ferroelectrics.
- Subjects
FERROELECTRIC crystals; FERROELECTRIC switching; SCANNING transmission electron microscopy; POLARIZATION (Nuclear physics); PIEZOELECTRICITY
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep04115