Formation of quasi-solitons in transverse confined ferromagnetic film media

Details Formation of quasi-solitons in transverse confined ferromagnetic film media Formation of quasi-solitons in transverse confined ferromagnetic film media

2007-03-31

arxiv.org/abs/0704.0024v1

Nonlinear Sciences

Pattern Formation and Solitons

First appeared in Prof. B. Hillebrands' research group Annual Report 2005 (http://www.physik.uni-kl.de/w_hilleb/ann05.html); a

Scientific paper

The formation of quasi-2D spin-wave waveforms in longitudinally magnetized stripes of ferrimagnetic film was observed by using time- and space-resolved Brillouin light scattering technique. In the linear regime it was found that the confinement decreases the amplitude of dynamic magnetization near the lateral stripe edges. Thus, the so-called effective dipolar pinning of dynamic magnetization takes place at the edges. In the nonlinear regime a new stable spin wave packet propagating along a waveguide structure, for which both transversal instability and interaction with the side walls of the waveguide are important was observed. The experiments and a numerical simulation of the pulse evolution show that the shape of the formed waveforms and their behavior are strongly influenced by the confinement.

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