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MA: Fachverband Magnetismus
MA 22: Magnetization Dynamics I
MA 22.2: Vortrag
Mittwoch, 2. April 2014, 09:45–10:00, HSZ 401
Ultrafast magnetic and structural dynamics in antiferromagnetic Europium-Telluride — •Christoph Trabant1,2,3,6, Niko Pontius1, Karsten Holldack1, Enrico Schierle1, Eugen Weschke1, Torsten Kachel1, Rolf Mitzner1, Martin Beye1, Gunther Springholz4, Georgi Dakovski5, Joshua J Turner5, Stefan Möller5, Tianhan Wang5, Alex Gray5, Markus Hantschmann5,1, Hermann Dürr5, Michael Minitti5, W.S. Lee5, Yi-De Chuang5, Zuman Hussain5, Z.X. Shen5, Matias Bargheer3, Daniel Schick3, Alexander Föhlisch1,3, and Christian Schüßler-Langeheine1 — 1Helmholtz-Zentrum Berlin — 2II. Physikalisches Institut, Universität zu Köln — 3Institut für Physik und Astronomie, Universität Potsdam — 4Institute of Semiconductor and Solid State Physics, Johannes Kepler Universität Linz, Austria — 5SLAC RSXS collaboration, USA — 6present address: Institut für Experimentalphysik, FU Berlin
Laser-induced magnetic dynamics is generally assumed to occur much faster than structural effects induced by the same laser pulse. In order to verify that, we studied both dynamics in a metallic 4f AFM EuTe thin film. The dynamics were mapped using the strong resonant x-ray scattering signal of the AFM (001/2) superstructure and (001) structural reflection. Here we report that the loss of antiferromagnetic order precedes structural changes on ultrafast timescales followed by strain wave dominated dynamics. The optical pump xray probe measurements have been performed in one experiment at the SXR-beamline of LCLS. Supported by the BMBF through contract 05K10PK2.