Dresden 2011 – wissenschaftliches Programm
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KR: Fachgruppe Kristallographie
KR 5: Poster Multiferroics (Joint Session of MA, DF, DS, KR, TT)
KR 5.104: Poster
Dienstag, 15. März 2011, 10:45–13:00, P2
Ultrafast, Element-Specific, Demagnetization Dynamics Probed using Coherent High Harmonic Beams — •Steffen Eich1, Stefan Mathias1,2, Chan La-O-Vorakiat2, Patrik Grychtol3, Roman Adam3, Mark Siemens2, Justin M. Shaw4, Hans Nembach4, Timm Rohwer5, Claus M. Schneider3, Tom Silva4, Martin Aeschlimann1, Margaret M. Murnane2, and Henry C. Kapteyn2 — 1Department of Physics and Resarch Center OPTIMAS, University of Kaiserslautern, Germany — 2JILA, University of Colorado and NIST, Boulder, Co, USA — 3Institute of Solid State Research, IFF-9, FZ Jülich, Germany — 4Electromagnetics Division, NIST, Boulder, Co, USA — 5Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Germany
Element-specific magnetization dynamics on nanometer length and femtosecond time scales is a topic of intense interest. Ultrafast, coherent, table-top, x-ray sources based on high-harmonic upconversion of femtosecond lasers provide a new tool to study how magnets work at the shortest time and length scales, with element specificity [1]. Here, we use this new experimental capability to extract element-specific demagnetization dynamics and hysteresis loops of Fe and Ni in Permalloy.
[1] La-o-vorakiat et al., PRL 103, 257402 (2009)