The curvature of the 180° cross-tie wall observed between adjacent crossed Bloch lines is attributed to the ripple model of the coercive field and depends in a defined manner on a magnetic field parallel and vertical to the cross-tie wall. Under the condition that domain walls move in single Barkhausen jumps and considering the stray field of a moving circular Bloch line, the above dependence leads to the motion of the 180° cross-tie wall below the static wall motion threshold, i.e. to wall creeping.
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P. Otschik (1970) studied this question.
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