Observation of domain wall bimerons in chiral magnets

Abstract

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.

30 pages, 10 figures (including Supplementary Materials)

References in corpus (8)

• A new class of chiral materials hosting magnetic skyrmions beyond room temperature
• Skyrmion fractionalization and merons in chiral magnets with easy-plane anisotropy
• Observation of two independent skyrmion phases in a chiral magnetic material
• Skyrmions from Instantons inside Domain Walls
• Domain wall Skyrmions
• Creating vortons and three-dimensional skyrmions from domain wall annihilation with stretched vortices in Bose-Einstein condensates
• Element-specific soft X-ray spectroscopy, scattering and imaging studies of skyrmion-hosting compound Co${}_8$Zn${}_8$Mn${}_4$
• Vital role of anisotropy in cubic chiral skyrmion hosts

Cited by in corpus (28)

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• Wigner solids of domain wall skyrmions
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• Tuning of topological properties in the strongly correlated antiferromagnet Mn${}_3$Sn via Fe doping
• Nonreciprocal Phonon Propagation in a Metallic Chiral Magnet
• Nonreciprocal dynamics of ferrimagnetic bimerons
• Bimerons create bimerons: proliferation and aggregation induced by currents and magnetic fields
• Spin wave stiffness and damping in a frustrated chiral helimagnet Co${}_8$Zn${}_8$Mn${}_4$ as measured by small-angle neutron scattering
• Spin Statistics and Surgeries of Topological Solitons in QCD Matter in Magnetic Field
• Controllable inter-skyrmion attractions and resulting skyrmion-lattice structures in two-dimensional chiral magnets with in-plane anisotropy
• Topological invariants of vortices, merons, skyrmions, and their combinations in continuous and discrete systems
• Magnetic Bimeron Traveling on the Domain Wall
• Skyrmion crystal phase on a magnetic domain wall in chiral magnets
• Background fields and self-dual Skyrmions
• Topological meron-antimeron domain walls and skyrmions in a low-symmetry system
• Topological melting of the metastable skyrmion lattice in the chiral magnet Co${}_9$Zn${}_9$Mn${}_2$
• Magnonics along the wall in Bimeron Chain Domain Walls
• Tuning of Electrical, Magnetic, and Topological Properties of Magnetic Weyl Semimetal Mn${}_{3+x}$Ge by Fe doping
• Domain Wall Networks as Skyrmion Crystals in Chiral Magnets
• Creation of domain-wall Skyrmions in chiral magnets
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• Magnetic D-brane solitons: skyrmion strings ending on a Néel wall in chiral magnets
• Spin-reorientation driven topological Hall effect in Fe4GeTe2
• Fermionic domain-wall Skyrmions of QCD in a magnetic field
• Creation of domain-wall skyrmions in chiral magnets with Landau-Lifshitz-Gilbert dynamics and demagnetization