Magnetic imaging of antiferromagnetic domain walls

Abstract

The control of domain walls or spin textures is crucial for spintronic applications of antiferromagnets. Despite many efforts, it has been challenging to directly visualize antiferromagnetic domains or domain walls with nanoscale resolution, especially in magnetic field. Here, we report magnetic imaging of domain walls in several uniaxial antiferromagnets, the topological insulator MnBi${}_2$Te${}_4$ family and the Dirac semimetal EuMnBi${}_2$, using cryogenic magnetic force microscopy (MFM). Our MFM results reveal higher magnetic susceptibility or net moments inside the domain walls than in domains. Domain walls in these antiferromagnets form randomly with strong thermal and magnetic field dependences. The direct visualization of domain walls and domain structure in magnetic field will not only facilitate the exploration of intrinsic phenomena in topological antiferromagnets, but also open a new path toward control and manipulation of domain walls or spin textures in functional antiferromagnets.

arXiv comment14 pages, 4 figures

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• Antiferromagnetic spintronics
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• Collective magnetism at multiferroic vortex domain walls
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Cited by in corpus (38)

• Colloquium: Quantum anomalous Hall effect
• Intertwined Topological and Magnetic Orders in Atomically Thin Chern Insulator MnBi2Te4
• Odd-even layer-number effect and layer-dependent magnetic phase diagrams in MnBi2Te4
• Imaging non-collinear antiferromagnetic textures via single spin relaxometry
• Robust A-type order and spin-flop transition on the surface of the antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Coexistence of Surface Ferromagnetism and Gapless Topological State in MnBi${}_2$Te${}_4$
• Two-channel anomalous Hall effect in SrRuO3
• Native Defects in Antiferromagnetic Topological Insulator MnBi${}_2$Te${}_4$
• Visualizing Atomically-Layered Magnetism in CrSBr
• Quantized anomalous Hall resistivity achieved in molecular beam epitaxy-grown MnBi2Te4 thin films
• Pressure-tuned intralayer exchange in superlattice-like MnBi2Te4/(Bi2Te3)n topological insulators
• Topological response of the anomalous Hall effect in MnBi2Te4 due to magnetic canting
• Dissipationless Layertronics in Axion Insulator $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$
• Direct evidence of ferromagnetism in MnSb2Te4
• Domain wall induced spin-polarized flat bands in antiferromagnetic topological insulators
• Large Itinerant Electron Exchange Coupling in the Magnetic Topological Insulator MnBi2Te4
• Controllable chirality and band gap of quantum anomalous Hall insulators
• Electrically Controlled Anomalous Hall Effect and Orbital Magnetization in Topological Magnet MnBi2Te4
• Chern Number Tunable Quantum Anomalous Hall Effect in Compensated Antiferromagnets
• Topological surface states of MnBi${}_2$Te${}_4$ at finite temperatures and at domain walls
• On the topological surface states of the intrinsic magnetic topological insulator Mn-Bi-Te family
• Ubiquitous order-disorder transition in the Mn antisite sublattice of the (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_n$ magnetic topological insulators
• Layer Zero-Line Modes in Antiferromagnetic Topological Insulators
• Direct visualization of surface spin-flip transition in MnBi4Te7
• Group theory study of the vibrational modes and magnetic order in the topological antiferromagnet MnBi${}_2$Te${}_4$
• Detection of Topological Spin Textures via Non-Linear Magnetic Responses
• Magnetic field control of antiferromagnetic domain walls in a thermal gradient
• Quantum anomalous Hall effects controlled by chiral domain walls
• Correlation between magnetic domain structures and quantum anomalous Hall effect in epitaxial MnBi2Te4 thin films
• Intermediate anomalous Hall states induced by noncollinear spin structure in magnetic topological insulator MnBi2Te4
• Evidence of Weyl Fermion Enhanced Thermal Conductivity Under Magnetic Fields in Antiferromagnetic Topological Insulator Mn(Bi(1-x)Sb(x))2Te4
• Fresnel diffraction imaging of surface nanostructure using coherent resonant X-ray scattering
• Interfacing Quantum Spin Hall and Quantum Anomalous Hall insulators: Bi bilayer on MnBi${}_2$Te${}_4$-family materials
• Topological linear magnetoresistivity and thermoconductivity induced by noncentrosymmetric Berry curvature
• Detecting axion dynamics on the surface of magnetic topological insulators
• Strain-driven domain wall network with chiral junctions in an antiferromagnet
• Hedgehog-like spin texture in Sb-doped MnBi${}_2$Te${}_4$
• Topological Magnetoelectric Switching on the Atomic Scale