Experimental investigations of the gyrotropic coupling between wall and Bloch line motions

The dynamics of vertical Bloch lines (VBL) in the Bloch walls of bubble garnet films are studied experimentally. A direct optical observation technique reveals VBL position. Static and pulsed in-plane as well as bias fields are used. The coercive properties of the sample give rise to complicated experimental behaviour in which zero VBL displacement coexists with erratic and 'regular' VBL displacement. The results are discussed qualitatively.<
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