Dresden 2009 – scientific programme

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MA: Fachverband Magnetismus

MA 10: Magnetic Imaging

MA 10.3: Talk

Monday, March 23, 2009, 17:45–18:00, HSZ 403

Phase sensitive BLS spectroscopy with magneto-optical modulator — •Frederik Fohr, Alexander A. Serga, Jaroslav Hamrle, and Burkard Hillebrands — FB Physik und Forschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

Space- and time-resolved Brillouin light scattering (BLS) spectroscopy is a well established method to investigate the spin-wave dynamics in thin magnetic films. However, this method is based on a simple counting of inelastically scattered photons and thus no phase information about magnetic excitations is accessible.

The implementation of phase resolution into Brillouin light spectroscopy not only leads to a complete picture of the underlying physical processes by combining space-, time- and phase-resolution into the measurement process, but also enhances the BLS dynamical range.

Here we report on further improvement of phase-resolved BLS by implementation of a new type of magneto-optical modulator, based on Brillouin light scattering in a thin ferrite film.

Support by the DFG (SFB/TRR 49 and Hi 380/21-1) is acknowledged.