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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 19.96: Poster

Dienstag, 15. März 2011, 10:45–13:00, P2

Mode symmetry breaking of propagating spin waves — •Peter Clausen, Helmut Schultheiss, Björn Obry, Sebastian Schäfer, Katrin Vogt, Georg Wolf, and Burkhard Hillebrands — Fachbereich Physik and Forschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

For the realization of spin-wave logic and spintronics, the understanding of spin-wave propagation in two-dimensional waveguides is essential. We investigate the influence of a double bend on the two-dimensional spin-wave transport in a Ni₈₁Fe₁₉-waveguide using space-resolved Brillouin light scattering microscopy.

The observed spin-wave intensity distribution is significantly influenced by the double-bend structure and two quite different regimes can be observed. In front of the bend, the spin-wave intensity measured across the width of the waveguide is symmetric whereas it shows a clear asymmetric pattern behind the double bend. We propose a transition from interfering spin-wave width modes of first and third order, which are originally exited by the antenna, to the superposition of the first and second width mode generated by the lateral symmetry break of the spin-wave waveguide.

Financial support by the Carl-Zeiss-Stiftung, the Graduiertenkolleg 792 and Graduate School of Excellence "MAterials Science IN MainZ" is gratefully acknowledged. The authors thank the Nano+Bio Center of the Technische Universität Kaiserslautern, P. A. Beck and P. Pirro for sample preparation.