Dresden 2006 – wissenschaftliches Programm

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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.75: Poster

Dienstag, 28. März 2006, 15:15–19:15, P1

Progress in micro-focus Brillouin light scattering spectroscopy — •H. Schultheiss¹, H.T. Nembach¹, M.C. Weber¹, P.A. Beck¹, P. Candeloro¹, B. Leven¹, V.E. Demidov², S.O. Demokritov², and B. Hillebrands¹ — ¹Fachbereich Physik und Forschungsschwerpunkt MINAS, TU Kaiserslautern, Erwin-Schrödinger-Str. 56, 67663 Kaiserslautern, Germany — ²Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster, Corensstr. 2-4, 48149 Münster, Germany

Brillouin light scattering microscopy combines the high magnetic sensitivity of conventional Brillouin light scattering spectroscopy, i.e., detection of thermally excited spin waves, with the high spatial resolution of a scanning microscopy technique. Imaging of periodic nanostructures for the optical characterization of the developed micro-BLS setup yields a spatial resolution of 300 nm. Numerical calculations within the framework of Fourier optics including spin wave induced phase shifts reveal an enhancement of the optical contrast while studying spin wave mode profiles. The implementation of high bandwidth picoprobes into the microscope allows for a local investigation of large angle spin dynamics in magnetic nanostructures due to broadband microwave excitations.

Support by the DFG within the SPP 1133 and by the EC-RTN ULTRASWITCH is acknowledged.