Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 21: Poster I

MA 21.113: Poster

Dienstag, 13. März 2018, 09:30–13:00, Poster A

Element-selective magnetic properties of mixed 3d - 4f metallacrowns — •Ahmed Alhassanat¹, Alexey A. Sapozhnik¹, Christoph Gamer², Angeliki Athanasopoulou², Lara Völker², Chen Luo³, Hanjo Ryll³, Florin Radu³, Eva Rentschler², and Hans-Joachim Elmers¹ — ¹Institut für Physik, Johannes Gutenberg-Universität Mainz — ²Institut für Anorganische und Analytische Chemie, Johannes Gutenberg-Universität Mainz — ³Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin

Single molecular magnets comprising rare earth metals are of high interest because the unquenched orbital moments of the rare earth ions result in a large energy barrier for magnetization reversal. We investigate polynuclear 4f - 3d metallacrowns using X-ray magnetic circular dichroism at low temperatures. The element-selective spin and orbital moments of the rare earth ions hint to a large magnetic anisotropy of up to 6 meV. The magnetic moments of some 3d transition metal ions can be controlled by chemical means upon changing the corresponding ligand field.