PARAMETRIC INTERACTION OF DIPOLAR SPIN-WAVE SOLITONS WITH LOCALIZED ELECTROMAGNETIC PUMPING

Parametric interaction of a propagating dipolar spin wave envelope sol iton (carrier frequency omega(s), duration tau(s), and velocity nu(s)) with electromagnetic pumping (frequency omega(p) = 2 omega(s)), local ized in a spatial region of width L, has been observed in magnetic fil ms for the first time. The necessary frequency bandwidth of interactio n was guaranteed by choosing L < \nu(s)\tau(s). The interaction result s in soliton amplification if the soliton arrives at the pumping regio n not more than 1 mu s after the pumping has been switched on. Otherwi se, the soliton is scattered by short-exchange-dominated spin waves of frequency omega(s) parametrically excited by the localized pumping.