Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Bio- and molecular magnetism including biomedical applications
MA 28.6: Vortrag
Mittwoch, 3. April 2019, 10:45–11:00, H52
Element specific determination of the magnetic properties of the macrocyclic tetranucluer 3d-4f complexes with Cu3Tb core by means of x-ray magnetic circular dichroism (XMCD) — •K. Kuepper1, K. Balinski1, L. Schneider1, J. Wöllermann1, A. Buling1, L. Joly2, C. Piamonteze3, H.L.C. Feltham4, S. Brooker4, A.K. Powell5, and B. Delley3 — 1Fachbereich Physik , Universität Osnabrück, Barbarastr. 7, Osnabrück D-49069, Germany — 2Universite de Strasbourg, CNRS, IPCMS, UMR 7504, Strasbourg F-67000, France — 3Paul Scherrer Institute, Villigen CH-5232, Switzerland — 4Department of Chemistry and the MacDiarmid Institute, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand — 5Institut für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstrasse 15, Karlsruhe D-76131, Germany
Feltham et al. synthesized molecules with Cu3Tb core using organic macrocyclic ligands, i.e. the propylene macrocycle (nickname: Cu3Tb(LPr)), which exhibits slow relaxation of magnetization [1], as well as a larger, butylene linked, macrocycle (nickname: Cu3Tb(LBu)) [2]. We used element specific XMCD to study the magnetic properties of these two molecules in external magnetic fields up to B=13.5 T and at temperatures between T=3K and T=10K [3]. We perform a sum rule analysis abd record element specific magnetization loops indicating a low value for the 3d-4f coupling. [1] H.L.C. Feltham et al., Inorg. Chem. 50, 4232 (2011). [2] H.L.C. Feltham et al., Inorg. Chem. 52, 3236 (2013). [3] K. Balinski et al., PCCP 20, 21286 (2018).