Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster 1

MA 19.18: Poster

Dienstag, 6. September 2022, 17:30–20:00, P2

The origin of S-shaped magnetizations and why the connection to toroidal moments is misleading — •Dennis Westerbeck, Daniel Pister, and Jürgen Schnack — Universität Bielefeld, D-33501 Bielefeld, Deutschland

Recent studies for toroidal molecules suggest a connection between low-lying toroidal states and an S-shaped magnetization [1]. We show that for theoretical models the S-shape neither is an evidence for a toroidal moment nor do all toroidal systems form S-shaped magnetizations [2]. Instead, the shape of magnetization curve is a result of a combination of strong anisotropies with spin-spin interactions blocking a spin flip for weak magnetic fields. The phenomenon also strongly depends on the spin quantum numbers. Toroidal moments even can be transformed to zero, if no additional anisotropic interactions between spins are taken into account.

[1] K. R. Vignesh, Nat. Commun. 8, 1023 (2017)

[2] J. M. Ashtree, Eur. J. Inorg. Chem. 2021 (5), 435 (2021)