Regensburg 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 50: Poster II
MA 50.52: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Comparing the ultrafast demagnetization of Gadolinium and Terbium — •Martin Teichmann1,2, Robert Carley1,2, Björn Frietsch1,2, Kristian Döbrich1,2, Jan Wolter1,2, John Bowlan1,2, and Martin Weinelt1,2 — 1Freie Universität Berlin — 2Max-Born-Institut Berlin
The laser-driven ultrafast demagnetization dynamics of the rare earths gadolinium and terbium show distinct behavior. We performed time- and angle-resolved photoemission experiments using high-order harmonics on Gd and Tb, revealing the occupied band structure in the 3rd Brillouin zone. By following the time evolution of the spin-split valence bands individually, we are able to separate the different effects acting during demagnetization, namely spin transport and electron-phonon scattering, while simultaneously monitoring the magnetization via the exchange splitting.
We see that the dynamics of the electron-phonon scattering is very similar in Gd and Tb, while the spin transport accounts for their differences.