SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 24: Molecular Magnetism II
MA 24.4: Vortrag
Mittwoch, 29. März 2023, 10:15–10:30, HSZ 02
Modelling of saw-tooth chain molecules composed of 3d and 4f ions — •Dennis Westerbeck and Jürgen Schnack — Universität Bielefeld, D-33501 Bielefeld, Deutschland
Metal- and lanthanide-ion containing systems are of great interest for the investigation of the magnetic properties of molecular systems. Especially the gadolinium containing systems are promising in view of magnetocaloric applications. In addition, saw-tooth like systems are considered as favorable for low-temperature cooling due to their massively degenerate ground-state. Although FeIII and GdIII are mostly considered as isotropic in multi-ion systems, we show that zero-field splittings are inevitable for the proper description of some of these molecules. Furthermore, these anisotropic saw-tooth systems show a significant isothermal entropy change, which is surprisingly well described by our simulations.