Deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow

Topological defects are found ubiquitously in various kinds of matter, such as vortices in type-II superconductors, and magnetic skyrmions in chiral ferromagnets. While knowledge on the static behavior of magnetic skyrmions is accumulating steadily, their dynamics under forced flow is still a widely open issue. Here, we report the deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow observed using small-angle neutron scattering. A spatially inhomogeneous rotation of the skyrmion lattice, with an inverse rotation sense for opposite sample edges, is observed for current densities greater than a threshold value j(t) similar to 1 MA m(-2) (10(6) A m(-2)). Our result show that skyrmion lattices under current flow experience significant friction near the sample edges due to pinning, this being a critical effect that must be considered for anticipated skyrmion-based applications at the nanoscale.


Publié dans:
Communications Physics, 2, 79
Année
Jul 11 2019
Publisher:
London, NATURE PUBLISHING GROUP
ISSN:
2399-3650
Mots-clefs:
Laboratoires:




 Notice créée le 2019-07-24, modifiée le 2019-12-05


Évaluer ce document:

Rate this document:
1
2
3
 
(Pas encore évalué)