Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
FM: Fachverband Funktionsmaterialien
FM 18: German-French Focus Session: (Anti)ferroic states – ferroelectrics, ferroelastics and antiferroelectrics II
FM 18.2: Hauptvortrag
Donnerstag, 12. März 2026, 10:45–11:15, BEY/0138
Strain effects in free-standing membranes of antiferroelectric Lead Zirconate — •Umair Saeed1, 2, Huazhang Zhang3, 4, David Pesquera1, Philippe Ghosez3, Nini Pryds5, Jose Santiso1, Felip Sandiumenge6, and Gustau Catalan1, 7 — 1ICN2, Catalonia — 2UAB, Spain — 3ULiège, Belgium — 4WUT, China — 5DTU, Denmark — 6ICMAB, Catalonia — 7ICREA, Catalonia
Antiferroelectrics like PbZrO3 (PZO) exhibit reversible switching between antiferroelectric and ferroelectric phases. However, complex energy landscape of PZO and few lattice matching substrates render strain engineering challenging. In this context, free-standing membranes provide a unique opportunity for strain tuning due to their flexibility.
We studied PZO membrane capacitors under homogeneous in-plane strain applied via bending, observing that the hysteresis decreases under in-plane compression and increases under tension. The results suggest that the changes in the switching behavior originate from the modification of energy barriers between the phases under the influence of strain rather than the energies of the phases. Molecular dynamic simulations show that this response depends on crystallographic directions of strain and electric field.
In wrinkled stand-alone PZO membranes, on the other hand, high strain gradients induce flexoelectric effects, leading to non-canonical antiferroelectric-like ordering under tensile and ferroelectric phases under compressive strain, highlighting strain as a tool to control PZO functionalities.
Keywords: Antiferroelectrics; Free-standing membranes; Strain; Flexoelectricity