Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 26: Molecular Magnetism
MA 26.2: Vortrag
Mittwoch, 7. September 2022, 15:15–15:30, H48
Inelastic Neutron Scattering and Magnetic Studies on Families 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 of slow relaxation and quantum tunnelling of the magnetization in the single molecule magnets (SMMs) two decades ago has led to a flurry of research towards improving their magnetic properties. This class of molecules has been expanded to heterometallic clusters incorporating transition metal and rare earth ions. The 4f ions are of interest because of their large angular momenta and magnetic anisotropies, but exactly the latter feature leads to unexpected challenges in the numerical analysis of experimental susceptibility and magnetization curves. Inelastic neutron scattering (INS) experiments were performed on the time-of-flight disk-chopper spectrometers IN5 and IN6 at ILL on the SMMs Mn2Ln2-squares with Ln = Y, Tb, Ho, Dy, and the M2Ln2-butterflies with M = Fe, Al and Ln = Dy, Er. High quality INS data were recorded, even for the Dy containing species besides the strong neutron absorbtion of this ions. The analysis and interpretation of the INS data, and of magnetic data, by means of a linked fit approach and using effective models is presented.