Current-induced sliding motion in a helimagnet MnAu_2
arxiv(2024)
Abstract
We have found a signature of current-induced sliding motion in a helimagnet
MnAu_2 thin film. In the helimagnetic state with a uniform chirality,
differential resistivity shows an abrupt change at a threshold bias current.
Judging from the similarity to the canonical charge/spin density wave systems,
we have ascribed the abrupt change to the sliding motion of the helimagnetic
structure. When the two chiral domains are equally mixed, the anomaly in the
differential resistivity disappears, indicating the strong pinning effect of
chiral domain wall.
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