BLOCH LINES DYNAMICS IN DOMAIN-WALL OF MAGNETIC-BUBBLE

Coupled dynamics of the vertical Bloch line and the domain wall of a b ubble domain in the case of two Bloch lines stabilized in the domain w all of a bubble by a planar magnetic field has been considered. The ex pression for the effective mass of Bloch line has been obtained and it is shown that the Bloch line mass is determined by the whole set of h armonics of bubble domain wall oscillations. The conditions at which t he oscillations of Bloch line may lead to instability of the domain wa ll structure with respect to generation of new Bloch lines have been d etermined.