Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 14: Poster
KFM 14.19: Poster
Mittwoch, 19. März 2025, 17:00–18:30, P1
Tailoring ferroelectric and magnetic properties in polycrystalline hexagonal manganites — Jonas Åmli Ingdal1, •Ruben Skjelstad Dragland1, Catalina Salazar2, Ellinor Benedikte Anjali Lindström1, Katharina Wolk1, Tino Gottschall2, Jiali He1, Jan Schultheiss1, and Dennis Meier1 — 1Norwegian University of Science and Technology (NTNU), Trondheim, Norway — 2Dresden High Magnetic Field Laboratory, Dresden, Germany
Rare-earth hexagonal manganites are extensively studied for their diverse physical phenomena, including tunable electronic behavior at ferroelectric domain walls, pronounced magnetocaloric effects, and significant thermal Hall conductivity, which make them highly interesting as advanced multi-functional materials. The intriguing effects arise from the unique combination of improper ferroelectricity and antiferromagnetic ordering, which are intimately linked to the rare-earth ions.
In this study, we systematically investigate the role of the rare-earth atom on the ferroelectric and magnetic properties of h-RMnO3. Polycrystalline samples with R = Tm, Er, Y, Ho, and Dy are synthesized using a solid-state approach. Ferroelectric order is verified across all compositions using piezoresponse force microscopy. Direct adiabatic temperature change measurements in the cryogenic regime reveal a strong correlation between rare-earth magnetism and the caloric response. Our results highlight the possibility to tune both the ferroelectric order and magnetic responses, offering new opportunities for optimizing the system for envisioned applications.