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MA: Fachverband Magnetismus

MA 19: Surface Magnetism

MA 19.10: Talk

Tuesday, March 19, 2024, 12:00–12:15, EB 407

Complex non-collinear spin structure of a Mn double layer on Ag(111) — •Tim Drevelow and Stefan Heinze — Institute of Theoretical Physics and Astrophysics, University of Kiel, Leibnizstraße 15, 24098 Kiel, Germany

Non-collinear spin structures in ultrathin transition-metal films are interesting for spintronic applications and can be stabilized by competing magnetic interactions. Higher-order exchange interactions have been shown to stabilize nontrivial spin structures such as a distorted 3Q state in a Mn monolayer on Re(0001) [1] and a conical spin spiral in a Mn double layer on W(110) [2]. The Ag(111) surface is a different type of substrate since it exhibits only a weak hybridization with magnetic overlayers and a small spin-orbit interaction such that exchange interactions should play a dominant role. Here, we present first-principles calculations for a Mn double layer on the Ag(111) surface using density functional theory. We reveal a complex three-dimensional magnetic ground state which is stabilized by higher-order exchange interactions.

[1] Haldar et al. Phys. Rev. B. 104, L180404 (2021).

[2] Yoshida et al. Phys. Rev. Lett. 108, 087205 (2012)

Keywords: density functional theory; anti-ferromagnetism; complex magnetic structures; magnetic bilayer systems