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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.64: Poster

Freitag, 4. April 2014, 10:30–13:30, P2

Optimization of the growth of Ni₈₁Fe₁₉ and Co₄₀Fe₄₀B₂₀ thin films for an all-optical characterization of micron-sized elliptical elements — •Ana Ruiz-Calaforra¹, Thomas Brächer^1,2, Tobias Fischer¹, Andres Conca¹, Britta Leven¹, and Burkard Hillebrands¹ — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — ²Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany

The optimization of the growth of thin ferromagnetic films is decisive for their future application in spintronic devices. Magnetic properties such as the damping or the spin polarization, which have a large impact on the operation efficiency of these devices, depend strongly on the metallic layers which compose them. We present an optimization of the growth of Ni₈₁Fe₁₉ and Co₄₀Fe₄₀B₂₀ thin films with different underlayers, aiming for a smooth topography, a controlled magnetic anisotropy and magnetic softness and a large magneto-optical signal. By structuring of micron-sized elliptical elements out of the films, the influence of the shape anisotropy and the magnetic anisotropy of the films on the overall magnetic anisotropy has been studied.

Financial support by the DFG-funding of the Excellence Initiative (GSC 266), by the state Rhineland-Palatinate (MBWWK and MWKEL) and by the European Regional Development Fund (ERDF) in the frame of the Spintronic Technology Platform (STeP) is gratefully acknowledged.