Berlin 2012 – scientific programme
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MA: Fachverband Magnetismus
MA 15: Magnetization / Demagnetization Dynamics I
MA 15.12: Talk
Tuesday, March 27, 2012, 12:45–13:00, H 1012
Magnetization Dynamics in FeCuNi and FeRuNi Multilayers - Influence of the Spacer Layer — •Roman Adam1, Dennis Rudolf1, Chan La-O-Vorakiat2, Patrik Grychtol1, Bastian Heller1, Emrah Turgut2, Stefan Mathias3, Moritz Plötzing1, Zbigniew Celinski4, Justin Shaw5, Hans Nembach5, Tom J. Silva5, Martin Aeschlimann3, Henry Kapteyn2, Margaret Murnane2, and Claus M. Schneider1 — 11Peter Grünberg Institut, PGI-6, Forschungszentrum Jülich, 52425, Jülich, Germany — 2Department of Physics and JILA, University of Colorado, Boulder, CO, USA — 3TU Kaiserslautern und Forschungszentrum OPTIMAS, Kaiserslautern, Germany — 4Center for Magnetism and Magnetic Nanostructures, UCCS, Colorado Springs, CO 80918, USA — 5Electromagnetics Division, NIST, Boulder, CO, USA
We performed time-resolved pump-probe measurements on Ni/Ru/Fe and Ni/Cu/Fe multilayers, testing magnetization dynamics on the femtosecond time scale using either visible or extreme ultraviolet (XUV) radiation, as a probe. In the latter experiments, laser-generated XUV radiation was tuned to the M absorption edges of Fe (53eV) and Ni (67eV). By exploiting strong signal enhancement at these resonance conditions, we obtained a clear element- and layer-selective magnetic contrast upon magnetization reversal of magnetic layers comprising the multilayers. Our measurements demonstrate that laser-based high-harmonic experiments employing XUV wavelengths can yield layer-selective information about the magnetization, contributing to detailed understanding of femtosecond switching in magnetic multilayers.