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MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.25: Poster
Freitag, 20. März 2020, 09:00–12:00, P2/EG
Controlled creation of magnetic stray field landscapes in synthetic antiferromagnets with perpendicular anisotropy by means of focused ion beam irradiation — •Fabian Samad1,2, Leopold Koch2, Gregor Hlawacek1, Sri Sai Phani Kanth Arekapudi2, Miriam Lenz1, and Olav Hellwig1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Chemnitz University of Technology, Chemnitz, Germany
Recently it was shown that a combination of magnetic field application and focused ion beam irradiation can be employed to create different magnetic stray field landscapes above the surface of exchange bias systems [1]. In our work, instead, we use layered synthetic antiferromagnets with perpendicular anisotropy as a starting state, which exhibits a great variety of magnetic states depending on the specific magnetic energy balance within the system [2]. We are able to stabilize different magnetic states locally and controllably, giving rise to a well-defined stray field landscape. Additionally, we show that the magnetic textures can be modified by an external magnetic field in a controlled way, enabling the post-irradiation modification of the stray field landscapes. These stray fields might be used to stabilize certain magnetic domain formations in a soft-magnetic overlayer deposited on top of the synthetic antiferromagnet, which could be utilized as a spin wave guiding infrastructure. [1] Mitin et al., Nanotechnology 29, 355708 (2018). [2] Hellwig et al., J. Magn. Magn. Mater. 319, 13-55 (2007).