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SUMMARY:V. Kiselev (Intitute of Metal Physics UB RAS\, Ekaterinburg\, Russ
 ia)
DTSTART:20250529T110000Z
DTEND:20250529T120000Z
DTSTAMP:20260423T005813Z
UID:mmandim/95
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/mmandim/95/"
 >Nonlinear dynamics of the bulk magnetostatic and exhange-dipole modes in 
 the ferromagnetic plate</a>\nby V. Kiselev (Intitute of Metal Physics UB R
 AS\, Ekaterinburg\, Russia) as part of Mathematical models and integration
  methods\n\n\nAbstract\nEffective equations of the Davey-Stewartson type a
 re obtained by the multiscale expansion technique\, that describe evolutio
 n of the three-dimensional magnetostatic excitations in the ferromagnetic 
 plate. The proposed approach admits generalization. It is shown\, that in 
 the ferromagnetic plates with thickness more than the exchange length evol
 ution of the three-dimensional exchange-dipole wave packets is also descri
 bed by the Davey-Stewartson equations. The threshold values of instability
  of the plane monochromatic waves are calculated. The modulational instabi
 lity of such waves leads to the formation of coherent  structures. The con
 ditions of the formation and explicit solutions for plane soliton excitati
 ons are found. In the framework of the proposed model\, the possibility of
  the critical collapse of the space localized two-dimensional wave structu
 res is predicted.\n
LOCATION:https://researchseminars.org/talk/mmandim/95/
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