Abstract

It is now becoming accepted that recent discoveries of new nonlinear magnetic excitations are stimulating a new growth area that will lead to a new range of microwave and millimetre wave devices¹. The literature already contains elegant experimental work on magnetostatic surface wave (MSSW) solitons on YIG films^2,3 and a study of chaotic spin waves. This presentation contains the first theoretical derivation of the existence criteria for MSSW solitons. Third-order nonlinearity is accounted for in the magnetisation equation and it is proved that envelope solitons occur for propagation oblique to the applied field. Finally, nonlinear diffraction of light from the MSSW will be considered by taking into account both Faraday and Cotton-Mouton effects in a new nonlinear permittivity tensor.

© 1989 Optical Society of America