Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 21: Poster I
MA 21.114: Poster
Dienstag, 13. März 2018, 09:30–13:00, Poster A
High-frequency AC susceptometry on Lanthanide-containing molecular magnets — •Léo de Souza, Krunoslav Prsa, and Oliver Waldmann — Physikalisches Institut, Universität Freiburg, Germany
We present details on the adaptation of a high-frequency (fmax=100 kHz) AC-susceptometer. Lanthanide-based molecular magnets display fast relaxation rates and in order to distinguish between different involved mechanisms it is necessary to use a large frequency range. We describe the steps taken to improve the existing home-made AC-setup towards reliable routine operation. A key aspect is calibration, especially the treatment of phase shifts. We show measurements done over a large span of frequencies and temperatures on a known paramagnetic sample used as a calibration standard and discuss the developed calibration techniques. In addition, preliminary results on a mixed transition metal-lanthanide molecular magnet are presented.