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Nonlinear magnetostatic surface waves in ferromagnetic films

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7 Author(s)
Boardman, A.D. ; Dept. of Pure & Appl. Phys., Salford Univ., UK ; Wang, Q. ; Nikitov, S.A. ; Shen, J.
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A comprehensive perturbation theory is presented, that enables the nonlinear wavenumber shift of magnetostatic surface waves (MSSW) on a thin ferromagnetic film to be calculated from first principles. The MSSW propagate, in this case, perpendicularly or obliquely to the applied magnetic field and their group-velocity dispersion is positive. Detailed calculations show that the nonlinear coefficient is also positive so that bright envelope solitons are forbidden. Nevertheless, nonlinear pulse shaping is possible so the use of the nonlinear Schrodinger equation is discussed in detail, together with the role of damping

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Magnetics, IEEE Transactions on  (Volume:30 ,  Issue: 1 )