Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 50: Poster II
MA 50.53: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
A Non-Equilibrium Band-Structure View of Ultrafast Magnetization Dynamics — •Robert Carley1,2, John Bowlan1, Kristian Döbrich2, Björn Frietsch1,2, Martin Teichmann1,2, Jan Wolter1, and Martin Weinelt1 — 1Freie Universität Berlin, Germany — 2Max-Born-Institut, Berlin, Germany
We present recent results from ultrafast laser-driven magnetization dynamics experiments on the rare-earth local-moment ferromagnet Gadolinium. Our experiment combines angle-resolved photoemission spectroscopy (ARPES) with the VUV photon energies and time resolution made possible by high-order harmonic generation to scrutinize the non-equilibrium band structure following excitation of the ferromagnet by a short infrared pulse. On the timescale of a few picoseconds, transient changes of the minority and majority components of the exchange-split valence band reveal significant insight into the underlying microscopic processes. Furthermore, linear magnetic dichroism in photoemission allows us to directly follow the magnetic response of the localized 4f electrons, from which the magnetic moment arises.