Scatena, Rebecca;
Liu, Ran;
Shvartsman, Vladimir V;
Khalyavin, Dmitry D;
Inaguma, Yoshiyuki;
Yamaura, Kazunari;
Belik, Alexei A;
(2023)
Hybrid Improper Ferroelectricity in Columnar (NaY)MₙMₙTi₄O₁₂.
Angewandte Chemie - International Edition
, Article e202305994. 10.1002/anie.202305994.
(In press).
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Abstract
We show that cation ordering on A site columns, oppositely displaced via coupling to B site octahedral tilts, results in a polar phase of the columnar perovskite (NaY)MnMnTi4O12. This scheme is similar to hybrid improper ferroelectricity found in layered perovskites, and can be considered a realisation of hybrid improper ferroelectricity in columnar perovskites. The cation ordering is controlled by annealing temperature and when present it also polarises the local dipoles associated with pseudo-Jahn–Teller active Mn2+ ions to establish an additional ferroelectric order out of an otherwise disordered dipolar glass. Below TN≈12 K, Mn2+ spins order, making the columnar perovskites rare systems in which ordered electric and magnetic dipoles may reside on the same transition metal sublattice.
| Type: | Article |
|---|---|
| Title: | Hybrid Improper Ferroelectricity in Columnar (NaY)MₙMₙTi₄O₁₂ |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/anie.202305994 |
| Publisher version: | https://doi.org/10.1002/anie.202305994 |
| Language: | English |
| Additional information: | © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH © The Author(s). This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Keywords: | Columnar Perovskites, Ferroelectrics, Hybrid Improper Ferroelectricity, Multiferroics, Perovskite. |
| 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 > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10172766 |
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