Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)

MA 18.39: Poster

Dienstag, 26. Februar 2008, 15:15–18:30, Poster E

Magnetization measurements of Co-coordinated fullerene-porphyrin dyads under pressure — •Klaus Gieb¹, Konstantin Pethukov¹, Jörg Dannhäuser², Andreas Hirsch², and Paul Müller¹ — ¹Institut für Physik der Kondensierten Matherie, Universität Erlangen-Nürnberg — ²Institut für Organische Chemie LS II, Universität Erlangen-Nürnberg

In this report we present the development of a small titanium alloy pressure cell that enables measurements of the magnetic moment under pressure. It can produce a pressure of 0.5 GPa, and is suitable for use in any Quantum-Design SQUID magnetometer. The pressure is established by the solidification of gallium inside the cell. Pressure calibration was established by the shift of the critical temperature of lead. A special background subtraction procedure has been developed. Susceptibility measurements of Co-coordinated fullerene-porphyrin dyads are presented. The samples show a pressure induced shift of the antiferromagnetic ordering temperature.