Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: POSTER Ia

MA 19.54: Poster

Dienstag, 17. März 2015, 09:30–13:00, Poster A

Spin pumping in epitaxially grown Fe/Pt systems with an MgO interlayer — •Laura Mihalceanu, Sascha Keller, Viktor Lauer, Jochen Greser, Andrés Conca, Burkard Hillebrands, and Evangelos Th. Papaioannou — Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

Understanding interface effects on spin pumping is a very exciting challenge in the field of spin currents excitation via magnetization dynamics. Here, we address the influence of the interface quality on spin pumping by using epitaxially grown samples. We use the Fe/Pt system as a model system to investigate the interface. For this purpose we study the interlayer effects by varying material composition, layer thickness and deposition temperature [1]. We focus on the impact of layer thickness of Pt on the spin-pumping efficiency. This efficiency can be obtained by measuring the current of the inverse spin Hall effect. Furthermore, we choose the Pt thickness which presents the highest spin-pumping efficiency and modify the interface by using an insulating layer of MgO. We show the dependence of spin pumping on the thickness of MgO and on the structural quality of the grown samples.
[1] E. Th. Papaioannou, P. Fuhrmann, M. B. Jungfleisch, T. Brächer, P. Pirro, V. Lauer, J. Lösch, and B. Hillebrands, Applied Physics Lettres 103, 162401 (2013).