Observation of Antiferroelectric Domain Walls in a Uniaxial Hyperferroelectric

Observation of Antiferroelectric Domain Walls in a Uniaxial Hyperferroelectric

© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 39 vom: 07. Sept., Seite e2405150
1. Verfasser: Conroy, Michele (VerfasserIn)
Weitere Verfasser: Småbråten, Didrik René, Ophus, Colin, Shapovalov, Konstantin, Ramasse, Quentin M, Hunnestad, Kasper Aas, Selbach, Sverre M, Aschauer, Ulrich, Moore, Kalani, Gregg, J Marty, Bangert, Ursel, Stengel, Massimiliano, Gruverman, Alexei, Meier, Dennis
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article DFT calculations antiferroelectric domain wall scanning transmission electron microscopy
Beschreibung
Zusammenfassung:© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
Ferroelectric domain walls are a rich source of emergent electronic properties and unusual polar order. Recent studies show that the configuration of ferroelectric walls can go well beyond the conventional Ising-type structure. Néel-, Bloch-, and vortex-like polar patterns have been observed, displaying strong similarities with the spin textures at magnetic domain walls. Here, the discovery of antiferroelectric domain walls in the uniaxial ferroelectric Pb5Ge3O11 is reported. Highly mobile domain walls with an alternating displacement of Pb atoms are resolved, resulting in a cyclic 180° flip of dipole direction within the wall. Density functional theory calculations show that Pb5Ge3O11 is hyperferroelectric, allowing the system to overcome the depolarization fields that usually suppress the antiparallel ordering of dipoles along the longitudinal direction. Interestingly, the antiferroelectric walls observed under the electron beam are energetically more costly than basic head-to-head or tail-to-tail walls. The results suggest a new type of excited domain-wall state, expanding previous studies on ferroelectric domain walls into the realm of antiferroic phenomena
Beschreibung:Date Revised 27.09.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202405150