Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.22: Poster
Tuesday, September 6, 2022, 17:30–20:00, P2
Approaches towards observing toroidal magnetic moments in Dy-based molecular nanomagnets with Inelastic Neutron Scattering techniques. — •Denny Lamon1, Julius Mutschler1, Thomas Ruppert2, Christopher E. Anson2, Annie K. Powell2, and Oliver Waldmann1 — 1Physikalisches Institut, Universität Freiburg, Germany — 2Institut für anorganische Chemie, Universität Karlsruhe, KIT, Germany
Single-molecule toroics (SMT) have been a subject of increasing interest both for their fundamental physics properties and for the potential applications in quantum computers or information storage. In fact the associated vortex arrangement of magnetic moments leads to weaker dipolar interactions and to a lack of interaction with a possible external magnetic field. A particular class of these molecules, which incorporate a triangle of exchange coupled magnetic Dy ions, can support a toroidal magnetic moment; in this work a class of Me2Dy3 molecules, there Me = Al, Cr, Fe, is investigated. The available experimental data for magnetic susceptibility and magnetization curves are fitted and simulated using full and effective Hamiltonian models in order to extract the model parameters, especially the tilt angles of the anisotropy axes. The inelastic neutron scattering spectra are simulated in order to develop experimental schemes for directly observing toroidal magnetic moments in SMTs.