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VOLUME 55 (1992) | ISSUE 1 | PAGE 44
Nonlinear dynamics of a unipolar domain wall
Forced vibrations of 180° Bloch wall in a yttrium iron garnet single crystal have been studied experimentally. A uniform magnetic field oscillating sinusoidally in time excites not only vibrations of the domain wall, at the frequency of the field, but also 2D magnons localized at this wall, over a broad frequency range. In strong fields, the motion of the magnetization in a domain wall becomes random, and nonlinear waves of the soliton type form in the wall.