Coherent nonlinear spin waves in ferromagnetic films and ferromagnetic/ferroelectric layered structures

Basic data for this project

Type of project: Individual project
Duration: 21/04/2005 - 20/04/2006

Description

The main goal of this project is to study the nonlinear spin-wave phenomena in magnetic systems with non-trivial topology, such as magnetic feedback active rings and spatially non- uniform structures. A complementary study of both active and passive magnetic systems allows us a comprehensive investigation of a wide variety of effects. Such phenomena as auto- generation of spin-wave envelope soliton trains and spin-wave chaotic dynamics in active rings as well as soliton formation and propagation in periodic potential profiles, tunnelling and tunnelling-associated instabilities in strong spatially-localised profiles will be investigated. The periodic and non-periodic profiles will be realized through spatial variation of the film thickness or the static magnetic field in thin ferromagnetic films. The experiments will be carried out using microwave spectroscopy as well as time-, space-, and phase-resolved Brillouin light scattering spectroscopy allowing for two-dimensional spatial visualization and characterisation of spin-wave propagation. The expected results will not only allow us to obtain fundamental information on specific nonlinear spin-wave processes but will contribute to a deepened understanding of the field of nonlinear wave physics in general.

Keywords: spin waves; coherent