6533b7defe1ef96bd12769b6
RESEARCH PRODUCT
Effect of boundary-induced chirality on magnetic textures in thin films
Jonathan LeliaertKarin Everschor-sitteMilorad V. MiloševićJeroen MulkersJeroen MulkersKjetil M. D. HalsKjetil M. D. HalsBartel Van Waeyenbergesubject
Condensed Matter - Materials ScienceMaterials scienceCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsSkyrmionPhysicsMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciences02 engineering and technologyRadiusPhysik (inkl. Astronomie)021001 nanoscience & nanotechnology01 natural sciencesSymmetry (physics)MagnetizationDomain wall (magnetism)FerromagnetismMagnetMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesTwist010306 general physics0210 nano-technologydescription
In the quest for miniaturizing magnetic devices, the effects of boundaries and surfaces become increasingly important. Here we show how the recently predicted boundary-induced Dzyaloshinskii-Moriya interaction (DMI) affects the magnetization of ferromagnetic films with a $C_{\infty v}$ symmetry and a perpendicular magnetic anisotropy. For an otherwise uniformly magnetized film, we find a surface twist when the magnetization in the bulk is canted by an in-plane external field. This twist at the surfaces caused by the boundary-induced DMI differs from the common canting caused by internal DMI observed at the edges of a chiral magnet. Further, we find that the surface twist due to the boundary-induced DMI strongly affects the width of the domain wall at the surfaces. We also find that the skyrmion radius increases in the depth of the film, with the average size of the skyrmion increasing with boundary-induced DMI. This increase suggests that the boundary-induced DMI contributes to the stability of the skyrmion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 |