Berlin 2008 – scientific programme
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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 18.2: Poster
Tuesday, February 26, 2008, 15:15–18:30, Poster E
Raman-spectroscopic investigations of the Keplerates MoyMx (M=V, Cr) — •Dietrich Wulferding1, Peter Lemmens1, Manash Ghosh1,3, Patric Scheib1, Ana Maria Todea2, Tamoghna Mitra2, and Achim Müller2 — 1IPKM, TU-Braunschweig, Germany — 2Fakultät für Chemie, Uni Bielefeld, Bielefeld — 3Department of Spectroscopy, IACS, Kolkata, India
We report on a Raman scattering investigations of the nanoscale magnetic cluster compounds MoyMx, with M = transition metal ion (Cr and V). Phonon and magnetic scattering are observed and correlated with structural and electronic properties of the systems. Magnetic frustration is evident as a broadening of a shoulder with a high energy cut-off comparable to the magnetic exchange energy. Multiphonon scattering is observed up to third order.