Dresden 2003 – scientific programme

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MA: Magnetismus

MA 14: Poster: Schichten(1-31), Spinabh.Trsp.(32-47), Exch.Bias(48-54), Spindyn.(55-64), Mikromag.(65-76), Partikel(77-88), Oflmag.(89-92), Spinelektr.(93-98), Elektr.Theo.(99-103), Mikromag+PhasÜ+Aniso.(104-122), MagnMat.(123-134), Messm+Mol-Mag.(135-139), Kondo(140-151)

MA 14.63: Poster

Tuesday, March 25, 2003, 15:15–19:15, Zelt

Formation of Envelope Solitons by Parametrically Amplified and Reversed Packets of Spin Waves — •Alexander A. Serga^1,2, Sergej O. Demokritov¹, Burkard Hillebrands¹, and Andrei N. Slavin³ — ¹Fachbereich Physik, Technische Universität Kaiserslautern, 67663 Kaiserslautern — ²Faculty of Radiophysics, Taras Shevchenko National University of Kiev, Kiev, Ukraine — ³Department of Physics, Oakland University, Rochester, MI, USA

Formation of dipolar spin wave (SW) envelope solitons from both initially linear and nonlinear SW packets parametrically amplified by microwave pumping has been studied experimentally in an axially magnetized yttrium-iron-garnet film waveguide by means of space- and time-resolved Brillouin light scattering technique. The interaction of a input spin wave packet with double-frequency microwave pumping leads to the formation of two parametrically amplified contra-propagating wave packets: forward and phase-conjugated reversed. It was found that both forward and reversed packets immediately after the interaction with pumping increase their lengths almost two times compared to the length of the input packet. In the course of further propagation both wave packets demonstrate a significant compression in length (up to 2.5 times) which depends on the power of the input signal and is a signature of envelope soliton formation.