Regensburg 2010 – scientific programme

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MA: Fachverband Magnetismus

MA 33: Poster II

MA 33.14: Poster

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

Distortion of the magnetization dynamics by domain walls — •Philipp Pirro, Sebastian Hermsdörfer, Björn Obry, Helmut Schultheiss, Katrin Vogt, Peter Andreas Beck, Peter Clausen, Thomas Brächer, Britta Leven, and Burkard Hillebrands — FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

Magnetic domain walls in soft magnetic thin film structures have attracted increasing attention during the last years due to their interaction with spin-polarized currents. The idea of new magnetic storage devices, the racetrack memories [1], was developed. An alternative solution to implement lateral spin transport are spin-waves which avoid a dissipative charge flow. New devices like spin-wave logic elements [2] can be constructed. In these devices, domain walls are supposed to play an important role [3]. The investigation presented is focused on the influence of magnetic domain walls on spin-waves. To analyze these interactions we use Brillouin Light Scattering Microscopy and Magnetic Force Microscopy. In the investigated Ni₈₁Fe₁₉-microstructures, domain walls can be nucleated and annihilated to study their influence on spin waves which are excited by the Oersted field of a microwave current flowing in a stripe antenna. Large effects of a domain wall on the spin-wave intensity are observed.

[1] S. S. P. Parkin, et al., Science 320,190 (2008)

[2] T. Schneider et al., Appl. Phys. Lett. 92, 022505 (2008)

[3] C. Bayer et al., IEEE Trans. Magn. 41, 3094 (2005)