Regensburg 2010 – scientific programme
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MA: Fachverband Magnetismus
MA 16: Micro- and Nanostructured Magnetic Materials II
MA 16.5: Talk
Wednesday, March 24, 2010, 11:15–11:30, H23
Saturation magnetization modulated stripes embedded in a ferromagnetic matrix — •Thomas Strache1, Sebastian Wintz1, Mohammed Abdul Basith2, Norbert Martin3, Monika Fritzsche1, Ingolf Mönch3, Maciej Oskar Liedke1, Michael Körner1, Daniel Markó1, Jörg Raabe4, Stephen McVitie2, Jeffrey McCord3, and Jürgen Fassbender1 — 1Forschungszentrum Dresden-Rossendorf, Dresden, Germany — 2University of Glasgow, Glasgow, U.K. — 3Leibniz-Institut für Festkörper- und Werkstoffforschung, Dresden, Germany — 4Swiss Light Source, Paul Scherrer Institut, Switzerland
Lateral patterning of thin magnetic films allows structuring on dimensions below certain intrinsic length scales like the domain wall width. By means of magnetic patterning using local ion irradiation periodic patterns of stripes with alternating saturation magnetization value were created in a ferromagnetic Ni80Fe20 matrix. The domain configuration during magnetization reversal was investigated using Kerr microscopy, scanning transmission x-ray microscopy, as well as Lorentz microscopy. The reversal mechanisms in the stripe panels are influenced by the domain configuration of the surrounding film. Starting from 1 µ m stripe width, changes in the micromagnetic behavior with respect to decreasing width are investigated. Special emphasis is put on the formation of 180 ∘ walls between adjacent stripes with different saturation magnetization, on the orientation of the magnetization inside the stripes with respect to the stripe axis orientation, as well as on the transition of the patterned material to an effective medium.