Dresden 2011 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)
MA 19.103: Poster
Tuesday, March 15, 2011, 10:45–13:00, P2
Towards an understanding of longitudinal x-ray-detected ferromagnetic resonance — •Katharina Ollefs1, Andreas Ney1, Ralf Meckenstock1, Detlef Spoddig1, Christoph Hassel1, Christian Schöppner1, Verena Ney1, Fabrice Wilhelm2, Andrei Rogalev2, Frithjof Nolting3, Carolin Antoniak4, Heiko Wende4, and Michael Farle1 — 1Fakultät für Physik - AG Farle, Universität Duisburg-Essen, 47057 Duisburg, Germany — 2ESRF, 38043 Grenoble Cedex, France — 3SLS, 5232 Villigen PSI, Switzerland — 4Fakultät für Physik - AG Wende, Universität Duisburg-Essen, 47057 Duisburg, Germany
We present a novel experimental setup for x-ray detected ferromagnetic resonance (XDFMR), which allows the simultaneous separation of three different detection channels after x-ray and microwave absorption: A) the conventional FMR detection by microwave absorption; B) x-ray detected lattice response due to the resonant microwave absorption, C) measurement of the high frequency susceptibility based on the x-ray magnetic circular dichroism (XMCD) effect.
The mechanisms for the different absorption signals detected at resonance will be discussed.
The microwave frequency can be tuned from 4-18 GHz allowing a detailed analysis of spin relaxation mechanisms and an element-specific investigation of the dynamic magnetic properties.
Supported by ESRF, SLS, BESSY and DFG, Heisenberg Programm, SFB 491.