Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.73: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

Quantum Tunneling of Magnetization in Tilted Toroidal Systems — •Jonas Waltenberg and Jürgen Schnack — Bielefeld University

Molecular magnets with a toroidal arrangement of the easy anisotropy axes are often viewed as promising candidates for magnetic storage and quantum computing [1,2]. For this a high stability against perturbations like external magnetic fields is needed. As a measure of this stability the tunneling matrix elements for spin systems of different sizes with easy anisotropy axes tilted from the collinear arrangement to the toroidal arrangement are calculated. It is discussed which systems are stable against this quantum tunneling of magnetization.

[1] D. Pister, K. Irländer, D. Westerbeck, J. Schnack, Toroidal magnetic molecules stripped to their basics, Phys. Rev. Research 4 (2022) 033221

[2] K. Irländer, J. Schnack, Studies of decoherence in strongly anisotropic spin triangles with toroidal or general non-collinear easy axes, Phys. Rev. Research 5 (2023) 013192

Keywords: Molecular Magnets; Toroidal Moments; Quantum Tunneling of Magnetization