Regensburg 2013 – scientific programme
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DF: Fachverband Dielektrische Festkörper
DF 22: Poster II
DF 22.30: Poster
Friday, March 15, 2013, 10:30–13:30, Poster D
Investigation of Domain Pattern and Magnetisation Reversal Process in Hexagonal Nano-Scaled Antidot Lattices — •Joachim Gräfe1, Felix Häring2, Ulf Wiedwald2, Paul Ziemann2, Ulrich Nowak3, Gisela Schütz1, and Eberhard Goering1 — 1Max Planck Institute for Intelligent Systems, Stuttgart, Germany — 2Department of Solid State Physics, Ulm, Germany — 3Department of Physics, Konstanz, Germany
Antidot lattices in magnetic materials can be a way to form artificial magnonic lattices as an approach towards spin-wave filters for spintronics [1]. Furthermore, the introduction of an antidot lattice provides a significant modification of static properties of the samples like the coercivity and magnetic anisotropy [2]. In this work we present results from investigations into the static regime of antidot lattice properties of in-plane (Fe) and out-of-plane (GdFe) systems. Results from x-ray microscopy indicate control over the formation and propagation of magnetic domains by the antidot pattern. Angular and spatially resolved MOKE measurements prove that the easy axes orientation is governed by the antidot lattice geometry, resulting in a six-fold symmetry of preferential magnetic axes. We present two distinct magnetisation reversal mechanisms occurring along the easy and hard axes in the antidot lattice.
[1] B. Lenk et al., Phys. Rep. 507 (2011) 107-136
[2] G. Ctistis et al., Nano Lett. 9 (2009) 1-6