Perovskite ferroelectric tuned by thermal strain

0508080 - FZÚ 2020 RIV GB eng J - Journal Article
Tyunina, Marina - Pacherová, Oliva - Perantie, J. - Savinov, Maxim - Jelínek, Miroslav - Jantunen, H. - Dejneka, Alexandr
Perovskite ferroelectric tuned by thermal strain.
Scientific Reports. Roč. 9, č. 1 (2019), s. 1-8, č. článku 3677. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA19-09671S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : strong dielectric * piezoelectric * pyroelectric * electrooptic * electrocaloric * perovskite
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.998, year: 2019
Method of publishing: Open access

To achieve desired performance within these requirements, innovative approaches are needed. In this work, we experimentally demonstrate that thermal strain can effectively tune the crystal structure and versatile properties of relatively thick films of environmentally friendly, biocompatible, and low-cost perovskite ferroelectric barium titanate. The strain arises during postdeposition cooling due to a mismatch between the thermal expansion coefficients of the films and the substrate materials. The strain-induced in-plane polarization enables excellent performance of bottomto- top barium titanate capacitors akin to that of exemplary lead-containing relaxor ferroelectrics. Our work shows that controlling thermal strain can help tailor response functions in a straightforward manner.
Permanent Link: http://hdl.handle.net/11104/0299073