Regensburg 2010 – scientific programme

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MA: Fachverband Magnetismus

MA 26: Spin Dynamics / Spin Torque IV

MA 26.8: Talk

Thursday, March 25, 2010, 16:15–16:30, H10

All-optical detection of phase fronts of propagating spin waves in a Ni₈₁Fe₁₉ microstripe — •Katrin Vogt, Helmut Schultheiss, Sebastian J. Hermsdoerfer, Philipp Pirro, Alexander A. Serga, and Burkard Hillebrands — Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

We present the determination of the wavelength and phase of propagating spin waves in magnetic microstructures made of Ni₈₁Fe₁₉ using the shorted end of a coplanar waveguide for local excitation. The spin wave characteristics have been measured by phase resolved Brillouin light scattering microscopy. This recently developed technique allows for the experimental visualization of the phase structure of propagating spin waves and is employed here to magnetic microstructures. The results show an excellent agreement with the calculated dispersion relations for the spin-wave waveguide modes.

Financial support by the DFG Priority Program SPP 1133 is gratefully acknowledged as well as the Nano+Bio Center of the Technische Universität Kaiserslautern for their assistance in sample preparation.