Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: Bio- and Molecular Magnetism

MA 20.11: Vortrag

Dienstag, 21. März 2017, 12:15–12:30, HSZ 301

Influence of intermolecular interactions on magnetic observables — •Jürgen Schnack — Universität Bielefeld, Fakultät für Physik, Universitätsstr. 25, D-33615 Bielefeld

Very often it is an implied paradigm of molecular magnetism that magnetic molecules in a crystal interact so weakly that measurements of dc magnetic observables reflect ensemble properties of single molecules. But the number of cases where the assumption of virtually noninteracting molecules does not hold grows steadily. A deviation from the noninteracting case can especially clearly be seen in clusters with antiferromagnetic couplings, where steps of the low-temperature magnetization curve are smeared out with increasing intermolecular interaction. In this contribution we demonstrate with examples in one, two, and three space dimensions how intermolecular interactions influence typical magnetic observables such as magnetization, susceptibility, and specific heat.

[1] J. Schnack, Phys. Rev. B 93 (2016) 054421