Dresden 2020 – wissenschaftliches Programm
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CPP 25.6: Vortrag
Montag, 16. März 2020, 16:15–16:30, HSZ 101
Dy2O-clusterfullerenes: Strong magnetic anisotropy and fullerene-dependent single molecule magnetism — •Georgios Velkos1, Wei Yang2, Stanislav Avdoshenko1, Ning Chen2, Bernd Büchner1, and Alexey Popov1 — 1Leibniz Institute for Solid State and Materials Research, Dresden, Germany — 2College of Chemistry, Soochow University, Suzhou, China
The exceptional ability of fullerenes to stabilize species which can hardly exist otherwise has been extensively used to create a number of endohedral metallofullerene families. Among them, there is a great interest in Dy-metallofullerenes, caused by their robust magnetic properties. In this work, we report on the synthesis and in-depth magnetic study of the first Dy2O-clusterfullerenes. The compact geometry of Dy2O cluster leads to both strong axial ligand field and unprecedentedly strong antiferromagnetic exchange coupling between Dy ions. We demonstrate that Dy2O-clusterullerenes are excellent molecular magnets exhibiting broad magnetic hysteresis and the strongest super-exchange coupling between Dy ions ever reported for non-radical bridged compounds.