Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 21: Frustrated Magnets I
MA 21.1: Vortrag
Mittwoch, 19. März 2025, 09:30–09:45, H18
Ab-initio exploration of complex magnetism of frustrated Mn and Cr films on hexagonal metallic surfaces — •Selcuk Sözeri1,2 and Samir Lounis2,1 — 1Faculty of Physics, University of Duisburg-Essen and CENIDE, 47053 Duisburg, Germany — 2Peter Grünberg Institut, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany
We employ ab initio first-principles simulations to explore the complex magnetic behavior in antiferromagnetic (AFM) systems. Specifically, we investigate Mn films on an Ag(111) substrate, where spin-polarized STM experiments established Néel order as the ground state for a single Mn layer [1,2] in contrast to previous predictions. Our focus extends to the interplay of Heisenberg exchange interactions, leading to magnetic frustration, and higher-order magnetic interactions when increasing the thickness of Mn films, which can host complex three-dimensional AFM spin-textures. Additionally, we examine the magnetic properties of multiple AFM Cr layers deposited on a PdFe bilayer supported by an fcc Ir(111) substrate. Instead of being in a Néel state, a single Cr layer prefers a row-wise AFM state, which hosts single and catenated intrinsic AFM skyrmions [3]. For thicker Cr films, we monitor the emergence of new topological magnetic objects.
– Project funded by DFG (SPP 2137: LO 1659/8-1).
– [1] Gao, et al., PRL 101, 267205 (2008); [2] Sözeri et al., submitted (2024); [3] Aldarawsheh et al., Nat. Commun.13, 7369 (2022); Front. Physics. 11, 335 (2023).
Keywords: Frustration; AFM Skyrmion; Surface