Regensburg 2010 – scientific programme

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MA: Fachverband Magnetismus

MA 33: Poster II

MA 33.76: Poster

Friday, March 26, 2010, 11:00–14:00, Poster B1

Spin wave propagation in permalloy antidot lattices — •Georg Dürr, Sebastian Neusser, and Dirk Grundler — Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, Physik Department, James-Franck-Straße 1, D-85747 Garching b. München, Germany

We present spin-wave spectroscopy data obtained on Ni₈₀Fe₂₀ (permalloy) thin films with periodic arrays of holes (antidot lattices). Samples are prepared using focused ion beam (FIB) etching and optical lithography. The periods of holes with a diameter of 100 nm vary between 400 nm and 800 nm. Spatially separated coplanar waveguides used for all-electrical emission and detection of spin waves are integrated into the samples. Propagating spin wave spectroscopy and pulsed inductive microwave magnetometry measurement techniques are used in frequency and time domain, respectively. Propagating spin wave modes are compared to both reflected spin wave modes and micromagnetic simulations. We focus on small in-plane magnetic fields where the propagating spin wave modes exhibit a complex angular dependence due to the inhomogeneity of both the demagnetization fields and domain configuration. The research leading to these results has received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement n^∘228673 and the German excellence cluster “Nanosystems Initiative Munich (NIM)”.