MIDIT OFD CATS Modelling, Nonlinear Dynamics Optics and Fluid Dynamics Chaos and Turbulence Studies and Irreversible Thermodynamics Risø National Laboratory Niels Bohr Institute and Technical University of Denmark Building 128 Department of Chemistry Building 321 P.O. Box 49 University of Copenhagen DK-2800 Lyngby DK-4000 Roskilde DK-2100 Copenhagen Ø Denmark Denmark Denmark
by M. Daniel
CENTRE FOR NONLINEAR DYNAMICS
DEPARTMENT OF PHYSICS
Friday, June 29, 2001, 14.00 h
at IMM, Bldg. 305, Room 018, DTU
Abstract: Heisenberg model of ferromagnetic spin systems in the classical coninuum limit with diffrent magnetic interactions have been identified as an interesting class of nonlinear dynamical systems exhibiting soliton and integrability properties. Often, integrability occurs in these systems for specific parametric choices. When electromagnetic field interacts with ferromagnetic medium the magnetisation of the medium is excited in the form of solitons and the electromagnetic wave is also modulated in the form of solitons. Depending on the direction of propagation of the electomagnetic wave the dynamical equation reduces to modified KdV or NLS equation.