Journal
FERROELECTRICS
Volume 433, Issue -, Pages 127-137Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00150193.2012.678159
Keywords
Ferroelectric nanodomains; Oxide superlattices; Double hysteresis; X-ray diffraction
Funding
- Swiss National Science Foundation through the National Center of Competence in Research, Materials with Novel Electronic Properties (MaNEP)
- Division II
- EU project OxIDes
- Leverhulme Trust
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Polydomain superlattices composed of ferroelectric PbTiO3 and paraelectric SrTiO3 were investigated by means of temperature-dependent X-ray diffraction and electrical measurements. The ferroelectric nanodomains were found to have an almost isotropic distribution of domain wall alignments and to be highly responsive to applied electric fields, giving rise to large enhancements in the overall dielectric response of the structure. Electrical measurements revealed a dramatic dependence of the dielectric permittivity, tunability, and polarization-voltage characteristics on the superlattice period. For short-period superlattices, double hysteresis loops were observed.
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