SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 24: Molecular Magnetism II
MA 24.6: Vortrag
Mittwoch, 29. März 2023, 10:45–11:00, HSZ 02
AOM-guided Linked Fits for Analysing Inelastic Neutron Scattering and Magnetic Data of 3d-4f Heterometallic M2Ln2 Single-Molecule Magnets — •Julius Mutschler1, Thomas Ruppert2, Yan Peng2, Jacques Ollivier3, Quentin Berrod3, Jean-Marc Zanotti3, Christopher E. Anson2, Annie K. Powell2, and Oliver Waldmann1 — 1Physikalisches Institut, Universität Freiburg, D-79104 Freiburg, Germany — 2Institut of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany — 3Institut Laue-Langevin, F-38042 Grenoble Cedex 9, France
The discovery two decades ago of slow relaxation and quantum tunnelling of the magnetization in the single molecule magnets (SMMs) has inspired a flurry of research into their magnetic properties. This class of molecules has been extended to heterometallic clusters containing ions of transition metals and rare earths. The 4f ions are of interest because of their large angular momentum and magnetic anisotropies, but also present challenges in the analysis of inelastic neutron scattering (INS) and magnetic data. As presented in the previous meeting, excellent INS data were recorded on the time-of-flight disk-chopper spectrometers IN5 and IN6 at ILL on the Mn2Ln2-squares with
Ln = Y, Tb, Ho, Dy, and the M2Ln2-butterflies with M = Fe, Al and Ln = Dy, Er. In this talk, the analysis of the complete set of magnetic data using an AOM-guided linked fit is presented. The resulting ligand field and coupling parameters give crucial hints for the analysis of the rich INS spectra.