Dresden 2020 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 11: Bio- and Molecular Magnetism (joint session MA/CPP)

MA 11.6: 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.