Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 66: Poster 3
MA 66.8: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG2
Magnetic Force Microscopy studies of synthetic perpendicular anisotropy antiferromagnets modified by ion beam irradiation — •Fabian Samad1, Benny Böhm1, Leopold Koch1,2, Fabian Ganss1, Sri Sai Phani Kanth Arekapudi1, Miriam Lenz2, Sven Stienen2, and Olav Hellwig1,2 — 1Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany — 2Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
By using ion beam irradiation of different energy and flux we modify and tune the magnetic reversal and microstructure in synthetic perpendicular anisotropy antiferromagnets consisting of [(Co/Pt)Co/Ru] multilayer systems. The magnetic energy balance between antiferromagnetic interlayer exchange and dipolar fields in the initial state of the samples has been tuned to have two local energy minima, one for laterally correlated and vertically anti-correlated magnetic structure (single domain antiferromagnet) and the other for laterally anti-correlated and vertically correlated magnetic structure (ferromagnetic stripe domains) [1]. Ion beam irradiation is then subsequently used to locally alter the magnetic microstructure from one state to the other to create laterally co-existing phases and study their reversal behavior in external magnetic fields using Magnetic Force Microscopy.
[1] O. Hellwig, J. B. Kortright, A. Berger and E. E. Fullerton, "Magnetic Reversal in Antiferromagnetically Coupled Perpendicular Films", J. Magn. Magn. Mater. 2007, 319, 13.