Berlin 2018 – scientific programme
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MA: Fachverband Magnetismus
MA 21: Poster I
MA 21.9: Poster
Tuesday, March 13, 2018, 09:30–13:00, Poster A
Modification of perpendicular anisotropy synthetic antiferromagnets by local ion 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
By using local ion irradiation we modify the magnetic microstructure of perpendicular anisotropy synthetic antiferromagnets (AF) consisting of [(Co/Pt)Co/Ru] multilayers. The systems magnetic energy balance between AF interlayer exchange and dipolar energy has been tuned such that its room temperature ground state exhibits a laterally correlated and vertically anti-correlated magnetic microstructure (single domain antiferromagnet) [1]. In our study we locally altered this energy balance with focused ion beam irradiation with different ion fluences and area shapes, giving rise to a variety of laterally coexisting magnetic phases and 3D-magnetic textures. Extensive studies of their interaction as well as their field reversal behavior were performed with in-field high resolution magnetic force microscopy.
[1] O. Hellwig, J. B. Kortright, A. Berger and E. E. Fullerton, J. Magn. Magn. Mater. 319, 13-55 (2007).