Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 26: Thin films – coupling effects
MA 26.5: Vortrag
Mittwoch, 14. März 2018, 10:30–10:45, EB 301
Manipulation of Perpendicular AF-Coupled Thin Film Systems by Ion Beam Irradiation — •Leopold Koch1,2, Miriam Lenz1, Fabian Samad2, Phani Arekapudi2, Lorenzo Fallarino1, and Olav Hellwig1,2 — 1Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany — 2Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany
The tuning of the magnetic properties of antiferromagnetically (AF) coupled multilayer films by ion beam irradiation has been investigated. Stacks of Co/Pt multilayers, AF-coupled by Ru interlayers, have been a model system for studying the energy contributions of interlayer exchange, perpendicular anisotropy and demagnetization [1]. The system shows a complex mixture of magnetic phases that can be tuned by the number of repeats of the Co/Pt-bilayers (X) and the number of Ru interlayers. A lateral homogeneous AF remanent magnetic structure occurs for small X due to the dominance of the AF-coupling. For large X the demagnetization energy prevails and ferromagnetic stripe domains evolve. Ion beam irradiation causes atomic intermixing at the Co/Pt and Co/Ru interfaces and successively changes the balance of the energy contributions. By irradiating locally, lateral heterogeneous structures of magnetic phases can be realized. Initial irradiation studies will be presented and discussed.
[1] O. Hellwig, J. B. Kortright, A. Berger and E. E. Fullerton, J. Magn. Magn. Mater., 2007, 319, 13.