Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 7, 2018
Previous Article Next Article

Domain alignment within ferroelectric/dielectric PbTiO3/SrTiO3 superlattice nanostructures

Author affiliations

Abstract

The ferroelectric domain pattern within lithographically defined PbTiO3/SrTiO3 ferroelectric/dielectric heteroepitaxial superlattice nanostructures is strongly influenced by the edges of the structures. Synchrotron X-ray nanobeam diffraction reveals that the spontaneously formed 180° ferroelectric stripe domains exhibited by such superlattices adopt a configuration in rectangular nanostructures in which domain walls are aligned with long patterned edges. The angular distribution of X-ray diffuse scattering intensity from nanodomains indicates that domains are aligned within an angular range of approximately 20° with respect to the edges. Computational studies based on a time-dependent Landau–Ginzburg–Devonshire model show that the preferred direction of the alignment results from lowering of the bulk and electrostrictive contributions to the free energy of the system due to the release of the lateral mechanical constraint. This unexpected alignment appears to be intrinsic and not a result of distortions or defects caused by the patterning process. Our work demonstrates how nanostructuring and patterning of heteroepitaxial superlattices allow for pathways to create and control ferroelectric structures that may appear counterintuitive.

Graphical abstract: Domain alignment within ferroelectric/dielectric PbTiO3/SrTiO3 superlattice nanostructures

Back to tab navigation

Supplementary files

Article information


Submitted
27 Sep 2017
Accepted
21 Jan 2018
First published
22 Jan 2018

Nanoscale, 2018,10, 3262-3271
Article type
Paper

Domain alignment within ferroelectric/dielectric PbTiO3/SrTiO3 superlattice nanostructures

J. Park, J. Mangeri, Q. Zhang, M. H. Yusuf, A. Pateras, M. Dawber, M. V. Holt, O. G. Heinonen, S. Nakhmanson and P. G. Evans, Nanoscale, 2018, 10, 3262
DOI: 10.1039/C7NR07203A

Social activity

Search articles by author

Spotlight

Advertisements