Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 33: Poster II

MA 33.75: Poster

Freitag, 26. März 2010, 11:00–14:00, Poster B1

Spin-wave excitation in magnetic nano hybrid structures — Christopher Rausch, Sebastian J. Hermsdörfer, Philipp Pirro, Helmut Schultheiss, •Britta Leven, and Burkard Hillebrands — FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

We present a micromagnetic study of artificial spin-wave excitation in magnetic nano hybrid structures in order to identify reliable spin-wave sources for experimental application. A variety of magnetic hybrid structures have been investigated, either hybrid structures built of different materials or hybrid structures built of differently shaped elements of the same material. First we investigated NiFe nanowires combined with a periodic array of Cu lines crossing the magnetic layer. When we pass a DC current through this Cu/NiFe hybrid structure, propagating spin waves are excited due to the periodic modification of the internal magnetic field caused by the Cu lines. Second we studied the spin-wave emission of resonantly excited domain walls in cross-type and T-type NiFe wires. Applying an AC current to the structures, spin-wave excitation can be observed. The advantage of the T-type structure is that the spin waves propagate in the current free arm of the structure in contrast to the cross-type structure thus offering a more universal spin-wave source for further experiments. We acknowledge financial support by the DFG.