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Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 3: Bio- and Molecular Magnetism

MA 3.5: Vortrag

Montag, 14. März 2011, 12:00–12:15, HSZ 401

First results obtained with the new frequency-domain Fourier-transform THz electron paramagnetic resonance technique on single-molecule magnets — •Jan Dreiser1,2, Kasper S. Pedersen3, Joscha Nehrkorn2, Alexander Schnegg4, Karsten Holldack4, Magnus Schau-Magnussen3, Philip Tregenna-Piggott5, Hannu Mutka6, Hoegni Weihe3, Jesper Bendix3, and Oliver Waldmann21Paul Scherrer Institut, Swiss Light Source, CH-5232 Villigen PSI — 2Physikalisches Institut, Universität Freiburg, D-79104 Freiburg — 3Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen — 4Helmholtz-Zentrum Berlin, D-12489 Berlin — 5Paul Scherrer Institut, Lab. for Neutron Scattering, CH-5232 Villigen PSI — 6Institut Laue-Langevin, F-38042 Grenoble

Single-molecule magnets are molecular spin clusters exhibiting slow relaxation of magnetization. In order to understand the interplay of anisotropy and exchange interaction within these clusters, spectroscopic measurements are needed in addition to magnetization and susceptibility studies. Recently, a new frequency-domain Fourier-transform electron paramagnetic resonance technique working in the THz range (FD-FT THz-EPR) has been developed at the BESSY storage ring in Berlin. In this contribution we present first results obtained with this technique. We further discuss the THz-EPR spectra in the context of inelastic neutron scattering, magnetization and susceptibility measurements.

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