Investigation of Static and Dynamic Stability of the Deformable Dynamic Spiral Magnetic Domain

The dependence of the stability of a spiral domain in an ac magnetic field on the allowable deformations of the domain shape has been investigated within the phenomenological model. The allowable deformations of the domain are characterized by some set of free parameters from the total number of parameters determining the domain shape. It has been shown that, in this model, the possible scenarios of the existence and disappearance of the spiral domain, some of which are implemented in experiments, can be established. Factors that determine the life span of the spiral domain have also been established within this model.