7 research outputs found
Observation of domain wall bimerons in chiral magnets
Topological defects embedded in or combined with domain walls have been
proposed in various systems, some of which are referred to as domain wall
skyrmions or domain wall bimerons. However, the experimental observation of
such topological defects remains an ongoing challenge. Here, using Lorentz
transmission electron microscopy, we report the experimental discovery of
domain wall bimerons in chiral magnet Co-Zn-Mn(110) thin films. By applying a
magnetic field, multidomain structures develop, and simultaneously, chained and
isolated bimerons arise as the localized state between the domains with the
opposite in-plane components of net magnetization. The multidomain formation is
attributed to magnetic anisotropy and dipolar interaction, and domain wall
bimerons are stabilized by the Dzyaloshinskii-Moriya interaction. In addition,
micromagnetic simulations show that domain wall bimerons appear for a wide
range of conditions in chiral magnets with cubic magnetic anisotropy. Our
results promote further study in various fields of physics.Comment: 30 pages, 10 figures (including Supplementary Materials