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MA: Fachverband Magnetismus
MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)
MA 19.99: Poster
Tuesday, March 15, 2011, 10:45–13:00, P2
Spin waves in antidot lattices on suspended membranes — •Florian Brandl, Rupert Huber, Sebastian Neusser, Georg Dürr, and Dirk Grundler — Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, Physik Department, James-Franck-Straße 1, D-85747 Garching b. München, Germany
We have developed a new fabrication method for antidot (AD) lattices using electron beam lithography. This method is based on a photonic crystal consisting of a periodic array of nanoholes etched into a freestanding Si membrane. The membrane is covered subsequently with thermally evaporated Ni80Fe20. Using all-electrical spin wave spectroscopy [1] we perform measurements on samples with different lattice constant and hole diameter. Applying an external magnetic field B of up to 100 mT in the plane of the AD lattices we find a series of resonant modes which depend characteristically on B. We perform micromagnetic simulations to analyze the AD modes in detail. We acknowledge financial support through the German excellence cluster "Nanosystems Initiative Munich" and the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement no. 228673 MAGNONICS.
[1] S. Neusser et al., Phys. Rev. Lett. 105, 067208 (2010).