Regensburg 2013 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 22: Poster II

DF 22.48: Poster

Friday, March 15, 2013, 10:30–13:30, Poster D

Femtosecond spin dynamic in ferromagnetic Fe/Ru/Ni nanopillars — •Jorge Martin^1,2, Marco Battiato⁴, Roman Adam^1,2, Dennis Rudolf^1,2, Chan La-o-vorakiat³, Justin M. Shaw⁵, Emrah Turgut³, Pablo Maldonado⁴, Stefan Mathias^3,6, Patryk Grychtol³, Hans T. Nembach⁵, Thomas J. Silva⁵, Martin Aeschlimann⁶, Henry C. Kapteyn³, Margaret M. Murnane³, Peter M. Oppeneer⁴, and Claus M. Schneider^1,2 — ¹Peter Grünberg Institut PGI-6 ,Forschungszentrum Jülich, 52425 Jülich, Germany — ²JARA, Fundamentals of Information Technology — ³Department of Physics and JILA, University of Colorado and NIST, Boulder, CO, USA — ⁴Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden — ⁵Electromagnetics Division, National Institute of Standards and Technology, Boulder, CO, USA — ⁶University of Kaiserslautern and Research Center OPTIMAS, 67663 Kaiserslautern, Germany

High harmonics generation, driven by a femtosecond pulsed laser, has provided a unique insight into the spin dynamics in ferromagnetic multilayered samples, due to the development of ultrafast probing techniques that combine femtosecond time resolution with element selectivity. We patterned Fe/Ru/Ni layers into an array of equally spaced nanopillars. Following optical pump, we employed the resonant transversal magneto optical Kerr effect for tracing the response of Fe and Ni layers separately, to gain deeper comprehension of the interplay of optically induced demagnetization-magnetization processes.