A connection between the asymmetry of the dynamic hysteresis loop and the asymmetry of the domain wall motion is discovered. The hysteresis loop branch with lesser coercive force corresponds to the domain wall motion from the middle of the ribbon to it surfaces. The hysteresis loop branch with a larger coercive force corresponds to the reversal of the domain wall direction of motion near the middle of their run towards the ribbon surface. The irreversible M_s rotation to the opposite direction over the entire ribbon volume precedes the reversal of the domain wall direction of motion.
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