Dynamics of domain walls with drifting Bloch lines in single crystals of yttrium iron garnet

Induction and magnetic methods are used to study the effect of drifting Blo ch lines on the wall velocity in a single crystal sample of yttrium iron ga rnet cut in the form of a long prism with only one 180-degree domain wall. A sharp increase in the velocity and in resonance bending vibrations of the wall are observed when Bloch line drift is initiated. The character of the wall motion is investigated under these conditions. An analysis of the exp erimental data shows that the effective reduction in the influence of drift ing Bloch lines on the characteristics of the wall motion may be related to a magnetic aftereffect phenomenon. (C) 1999 American Institute of Physics. [S1063-7761(99)01504-8].