Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 50: Poster II

MA 50.41: Poster

Freitag, 15. März 2013, 10:30–13:30, Poster D

Brillouin light scattering investigations of perpendicular standing spin waves at Au and Ag nanoparticles on top of a Ni₈₁Fe₁₉ film — •Thomas Meyer, Björn Obry, and Burkard Hillebrands — FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

In the last decades localized plasmons excited in metallic nanoparticles providing a local field enhancement were used to increase the signal strength and spatial resolution like in the case of surface enhanced Raman spectroscopy. We present Brillouin light scattering (BLS) studies of perpendicular standing spin waves in a thin Ni₈₁Fe₁₉ film with single Au and Ag nanoparticles on top. An increase of the BLS signal as well as a frequency shift of the spin waves due to the metal nanoparticles is observed. To describe this, and besides their plasmonic properties, other influences of the nanoparticles on the magnetization dynamics have to be taken into account. In order to identify the contributions to the observed signal changes, investigations using different materials, sizes and shapes of the structures have been performed.