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MA: Fachverband Magnetismus
MA 51: Magnetic textures II
MA 51.2: Vortrag
Donnerstag, 15. März 2018, 15:15–15:30, EB 407
Creating 3D-magnetic textures in synthetic antiferromagnets by focused ion beam irradiation — •Fabian Samad1, Leopold Koch1,2, Phani Arekapudi1, Miriam Lenz2, and Olav Hellwig1,2 — 1Institute of Physics, Chemnitz University of Technology, Germany — 2Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Germany
The DMI assisted emergence of 3D-magnetic textures in general and magnetic skyrmions in particular were hitherto typically observed in B20-materials at low temperatures or in ferromagnetic multilayers at room temperature [1]. In contrast, we used a synthetic antiferromagnet (AF) [2] as a ground system which provides the striking benefits of an absence of stray fields as well as high domain wall velocities [3], making it interesting for possible future data storage applications. Using focused ion beam irradiation with different fluences, we modified the local energy interplay between AF interlayer exchange and dipolar energy. Thus, we were able to create a variety of laterally coexisting magnetic phases and 3D-magnetic textures in different confinements. Detailed investigation of their interactions as well as their field reversal behavior were performed with in-field high resolution magnetic force microscopy.
[1] Soumyanarayanan et al., Nat. Mater. 16, 898-904 (2017)
[2] Hellwig et al., J. Magn. Magn. Mater. 319, 13-55 (2007).
[3] Yang et al., Nat. Nanotechnol. 10, 221-226 (2015).