Abstract
The performance of ferroelectric devices is intimately entwined with the structure and dynamics of ferroelectric domains. In ultrathin ferroelectrics, ordered nanodomains arise naturally in response to the presence of a depolarizing field and give rise to highly inhomogeneous polarization and structural profiles. Ferroelectric superlattices offer a unique way of engineering the desired nanodomain structure by modifying the strength of the electrostatic interactions between different ferroelectric layers. Through a combination of X-ray diffraction, transmission electron microscopy, and first-principles calculations, the electrostatic coupling between ferroelectric layers is studied, revealing the existence of interfacial layers of reduced tetragonality attributed to inhomogeneous strain and polarization profiles associated with the domain structure.
Original language | English |
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Pages (from-to) | 2846-2851 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 12 |
Issue number | 6 |
DOIs | |
Publication status | Published - 13 Jun 2012 |
Externally published | Yes |
Keywords
- electron energy loss spectroscopy
- electrostatic coupling
- Ferroelectric domains
- oxide superlattices
ASJC Scopus subject areas
- Condensed Matter Physics
- Bioengineering
- General Chemistry
- General Materials Science
- Mechanical Engineering