Investigation of toroidal magnetic moments in Dy-based molecular nanomagnets.

Molecular nanomagnets which incorporate a triangle of exchange coupled, magnetic Dy ions can support toroidal magnetic moments. In this work, a Al2Dy3 molecule is investigated with regards to magnetic susceptibility, magnetization curves, and inelastic neutron scattering (INS) spectra. 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.