Regensburg 2019 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 14: Poster
DS 14.9: Poster
Dienstag, 2. April 2019, 17:00–20:00, Poster E
Magnetization Reversal of Individual Three Dimensional (3D) Fe-Co Nanostructures — •Mohanad Al Mamoori1, Lukas Keller1, Michael Huth1, Christian Schröder2, and Jens Müller1 — 1Institute of Physics, Goethe University Frankfurt — 2Institute for Applied Materials Research, Bielefeld University of Applied Sciences
Three dimensional (3D) magnetic nanostructures are promising for future magnetic memory and sensing applications, in particular since more complex magnetic configurations become possible when expanding 2D nanomagnets to the third dimension. In [1,2], we have employed focused electron beam induced deposition (FEBID) to grow 3D nanomagnets in combination with a micro-Hall sensor acting as substrate and high-resolution detection device of small magnetic stray fields. We find that the magnetisation reversal propagates by multi-domain switching scenarios. In this presentation, firstly, systematic measurements of the magnetic stray fields of Fe-Co nano-cubes and -trees as a function of temperature and magnetic field applied at different angles, will be reported. Secondly, in order to gain further insights in the hysteresis loops, (irreversible) magnetic interaction effects and coercivity distributions, first-order-reversal curves (FORC) of these 3D nanomagnets supported by simulations of a simple macro-spin model, will be shown. Finally, an outlook to the future design of such structures towards the realization of 3D artificial spin ice architectures will be given. [1] L.Keller et al., Sci. Rep. 8 , 6160 (2018). [2] M. Al Mamoori et al., Materials 11, 289 (2018).