# Anti-polar state in BiFeO$$_3$$/NdFeO$$_3$$ superlattices

Khaled, M. A., Arnold, Donna C., Dkhil, B., Jouiad, M., Hoummada, K., El Marssi, M., Bouyanfif, H. (2021) Anti-polar state in BiFeO$$_3$$/NdFeO$$_3$$ superlattices. Journal of Applied Physics, 130 (24). Article Number 244101. ISSN 0021-8979. (doi:10.1063/5.0073668) (KAR id:92594)

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## Abstract

Antiferroelectrics are promising materials for high energy density capacitors and the search for environmentally-friendly and efficient systems is actively pursued. An elegant strategy to create and design new (anti)ferroic system relies on the use of nanoscale superlattices. We report here the use of such strategy and the fabrication of nanoscale BiFeO$$_3$$/NdFeO$$_3$$ superlattices and in depth characterization using high resolution X-ray diffraction and Transmission Electron Microscopy. The structural analysis at atomic scale demonstrates that such superlattices host anti-polar ordering most likely described by an antiferroelectric-like Pbnm symmetry. Temperature dependence of anti-polar state and structural transition further hint that the stability of the anti-polar state is controlled by the BiFeO$$_3$$ layer thickness within the stacking and, in a more moderate way, by interlayer strain. Discovery of such polar arrangement in superlattices and the possible generalization to the whole rare-earth family pave the way to new platforms for energy storage application as well as nano-electronic devices.

Item Type: Article 10.1063/5.0073668 Q Science Divisions > Division of Natural Sciences > Chemistry and Forensics Susan Grimer 07 Jan 2022 16:51 UTC 10 Jan 2022 13:20 UTC https://kar.kent.ac.uk/id/eprint/92594 (The current URI for this page, for reference purposes) https://orcid.org/0000-0003-0239-5790
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