Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Magnetization / Demagnetization Dynamics II

MA 35.11: Vortrag

Mittwoch, 18. März 2015, 17:45–18:00, EB 301

Interplay of spin scattering and spin transport in the complex demagnetization of Ni — •Oliver Schmitt, Moritz Barkowski, Sakshath S, Daniel Steil, Mirko Cinchetti, Stefan Mathias, and Martin Aeschlimann — Department of Physics and Research Center OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

We use femtosecond time-resolved MOKE to study ultrafast demagnetization in a variety of different Ni films. With this approach, we aim to investigate and quantify the interplay of spin-flipping and spintransport in the demagnetization process [1][2]. To exclude one of each possible channel, we performed measurements on Ni films that are fabricated into various different multilayer compositions. For our investigations, we than extended our MOKE setup by an advanced Kerr method, which enables us to measure a distinct depth or layer of the sample system [3].

[1] B. Koopmans et al., Nature Materials 9, 259-265 (2010)

[2] E. Turgut et al., PRL 110, 197201 (2013)

[3] A. J. Schellekens et al., PR B 90, 104429 (2014)