| Autor: |
Pice, Chen, Margaret P, Cosgriff, Qingteng, Zhang, Sara J, Callori, Bernhard W, Adams, Eric M, Dufresne, Matthew, Dawber, Paul G, Evans |
| Rok vydání: |
2012 |
| Zdroj: |
Physical review letters. 110(4) |
| ISSN: |
1079-7114 |
| Popis: |
The remnant polarization of weakly coupled ferroelectric-dielectric superlattices is distributed unequally between the component layers, and as a result the components respond differently to applied electric fields. The difference is apparent in both the nanometer-scale structure of striped polarization domains and in the development of piezoelectric strain and field-induced polarization. Both effects are probed with in situ time-resolved synchrotron x-ray diffraction in a PbTiO(3)/SrTiO(3) superlattice in fields up to 2.38 MV/cm. Domains are initially distorted to increase the polarization in the SrTiO(3) layer while retaining the striped motif. The subsequent transformation to a uniform polarization state at a later time leads to piezoelectric expansion dominated by the field-induced polarization of the SrTiO(3) layers. The results are consistent with theoretical predictions of the field dependence of the domain structure and electrical polarization. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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