Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 33: Poster II

MA 33.55: Poster

Freitag, 26. März 2010, 11:00–14:00, Poster B1

Magnetic and structure studies on thin films of co-evaporated Heusler compounds — •Jan Rogge, Fabian Schmid-Michels, and Andreas Hütten — Thin Films and Physics of Nanostructures, Department of Physics, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany

Heusler compounds are promising candidates for spinelectronic devices like magnetic sensors or MRAM because of their unique magnetic properties. High Curie temperatures and low coercive fields, an indispensable pair for most applications, attract more and more attention to these materials. Above all the theoretically predicted 100% spin polarization [1] of many Heusler compounds shows great promise for reaching high MR ratios with magnetic tunnel junctions containing ferromagnetic Heusler electrodes.

We grow Heusler thin films by molecular beam epitaxy (MBE) co-evaporation, which enables us to produce alloyed Heusler layers with various compositions. We will present magnetic and structure studies on co-evaporated thin films of different Heusler compounds. The impact of stoichiometric variations on the examined properties will further be discussed.

[1] R.A. de Groot, F.M. Mueller, P.G. van Engen and K.H.J. Buschow, Phys. Rev. Lett. 50 (1983) 2024