Hadjimichael, M;
Li, Y;
Yedra, L;
Dkhil, B;
Zubko, P;
(2020)
Domain structure and dielectric properties of metal-ferroelectric superlattices with asymmetric interfaces.
Physical Review Materials
, 4
(9)
, Article 094415. 10.1103/PhysRevMaterials.4.094415.
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Abstract
PbTiO_{3}/SrRuO_{3} superlattices deposited on SrTiO_{3} substrates are studied using a combination of x-ray diffraction, piezoresponse force microscopy, scanning transmission electron microscopy, transport measurements, and impedance spectroscopy. The superlattices are found to have two inequivalent interfaces resulting from differences in the growth modes for PbTiO_{3} and SrRuO_{3}. X-ray SrRuO_{3} layers, the ferroelectric layers possess dense nanoscale domains. The observed domain sizes are comparable to those found in ferroelectric-dielectric systems, and they are attributed to the depolarizing field caused by the finite screening length of the SrRuO_{3} - PbTiO_{3} interface. The macroscopic capacitance of the ultrathin PbTiO_{3} layers was measured, and its temperature dependence was found to be consistent with permittivity enhancement due to domain wall motion.
| Type: | Article |
|---|---|
| Title: | Domain structure and dielectric properties of metal-ferroelectric superlattices with asymmetric interfaces |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevMaterials.4.094415 |
| Publisher version: | https://doi.org/10.1103/PhysRevMaterials.4.094415 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10111315 |
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