1. Mapping the complex evolution of ferroelastic/ferroelectric domain patterns in epitaxially strained PbTiO3 heterostructures
- Author
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Lichtensteiger, Céline, Hadjimichael, Marios, Zatterin, Edoardo, Su, Chia-Ping, Gaponenko, Iaroslav, Tovaglieri, Ludovica, Paruch, Patrycja, Gloter, Alexandre, and Triscone, Jean-Marc
- Subjects
Condensed Matter - Materials Science ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences - Abstract
We study the complex ferroelastic/ferroelectric domain structure in the prototypical ferroelectric PbTiO3 epitaxially strained on (110)o-oriented DyScO3 substrates, using a combination of atomic force microscopy, laboratory and synchrotron x-ray diffraction and high resolution scanning transmission electron microscopy. We observe that the anisotropic strain imposed by the orthorhombic substrate creates a large asymmetry in the domain configuration, with domain walls macroscopically aligned along one of the two in-plane directions. We show that the periodicity as a function of film thickness deviates from the Kittel law. As the ferroelectric film thickness increases, we find that the domain configuration evolves from flux-closure to a/c-phase, with a larger scale arrangement of domains into superdomains., Comment: 18 pages, 5 figures + supplementary materials (2 pages, 2 figures)
- Published
- 2023
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