Dresden 2014 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.5: Poster
Tuesday, April 1, 2014, 13:00–15:30, P1
High-frequency electron paramagnetic resonance studies on heterometal-organic complexes — Changhyun Koo1, Jaena Park1, Sebastian Schmidt2, Dieter W. Heermann3, Vladislav Kataev4, Annie K. Powell2,5, and •Rüdiger Klingeler1 — 1Kirchhoff Institute for Physics, Heidelberg University, Heidelberg, Germany — 2Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany — 3Institute for Theoretical Physics, University of Heidelberg, Heidelberg, Germany — 4Leibniz Institute for Solid State and Materials Research IFW Dresden, Dresden, Germany — 5Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe, Germany
High-frequency electron paramagnetic resonance (HF-EPR) is a powerful tool to investigate in detail spin dynamics and magnetic properties such as g-factor, spin states, anisotropy, and exchange interaction of various materials. The tunable HF-EPR set-up established in Heidelberg covers the frequency range from 8 GHz to 1 THz and allows magnetic fields up to 18 T. Studies on various heterometallic complexes consisting of transition metal and/or lanthanide ions will be presented. One example are 3d-4f heteronuclear clusters, Fe4Ln2-comlexes Ln = Tb, Dy, Ho, Y, and Gd. HF-ESR data analyzed in terms of the Ising-spin concept provide estimates of the magnetic coupling between 4f- and 3d-ions.