Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 66: Poster 3
MA 66.9: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG2
Impact of ion irradiation on magneto-resistance properties of synthetic antiferromagnets based on [(Co/Pt)X−1Co/Ru]N multilayers — •Benny Böhm1, Fabian Samad1, Leopold Koch1,2, Sri Sai Phani Kanth Arekapudi1, Fabian Ganss1, Miriam Lenz2, Sven Stienen2, and Olav Hellwig1,2 — 1Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
In this study integral magnetic properties and local microstructure in synthetic perpendicular anisotropy antiferromagnets consisting of [(Co/Pt)X−1Co/Ru]N multilayers are modified using ion irradiation. The magnetic domain structure in the perpendicular anisotropy system is systematically modified by introducing antiferromagnetic exchange (via the Ru-thickness). This also results in two singular reversal modes (magnetic phases), one phase in which the AF exchange dominates (results in no magnetic stray field on the surface) and the other in which the dipolar interaction dominates leading to ferromagnetic stripe domains. Furthermore, ion irradiation with different kinetic energies and fluences is employed to locally modify the microstructure, therefore switching from one phase to another, resulting in laterally co-existing AF and FM-regions. Initial magneto-transport measurements on magnetic heterostructures will be presented.
[1] Olav Hellwig, Taryl L. Kirk, Jeffrey B. Kortright, Andreas Berger & Eric E. Fullerton, “A new phase diagram for layered antiferromagnetic films”, Nature Materials 2, 112 - 116 (2003)