Meta-magnetism of weakly-coupled antiferromagnetic topological insulators

Abstract

The magnetic properties of the van der Waals magnetic topological insulators MnBi${}_2$Te${}_4$ and MnBi${}_4$Te${}_7$ are investigated by magneto-transport measurements. We evidence that the relative strength of the inter-layer exchange coupling J to the uniaxial anisotropy K controls a transition from an A-type antiferromagnetic order to a ferromagnetic-like metamagnetic state. A bi-layer Stoner-Wohlfarth model allows us to describe this evolution, as well as the typical angular dependence of specific signatures, such as the spin-flop transition of the uniaxial antiferromagnet and the switching field of the metamagnet.

arXiv comment22 pages, 8 figures; typos corrected, references added

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Cited by in corpus (26)

• Odd-even layer-number effect and layer-dependent magnetic phase diagrams in MnBi2Te4
• Ferromagnetic-antiferromagnetic coexisting ground states and exchange bias effects in $\mathbf{MnB}{\mathbf{i}}_4\mathbf{T}{\mathbf{e}}_7$ and $\mathbf{MnB}{\mathbf{i}}_6\mathbf{T}{\mathbf{e}}_{10}$
• Pressure-tuned intralayer exchange in superlattice-like MnBi2Te4/(Bi2Te3)n topological insulators
• Quantum Imaging of Magnetic Phase Transitions and Spin Fluctuations in Intrinsic Magnetic Topological Nanoflakes
• Growth, characterization and Chern insulator state in MnBi${}_2$Te${}_4$ via the chemical vapor transport method
• Crystal structure and Raman active lattice vibrations of magnetic topological insulators MnBi2Te4 n(Bi2Te3) (n = 0, 1, . . . , 6)
• Approaching a Minimal Topological Electronic Structure in Antiferromagnetic Topological Insulator MnBi2Te4 via Surface Modification
• Strongly anisotropic spin dynamics in magnetic topological insulators
• Two-dimensional ferromagnetism with long-range interactions in the layered magnetic topological insulator MnBi2Te4
• Magnetic field tuning of the spin dynamics in the magnetic topological insulators (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_n$
• Metamagnetism of few layer topological antiferromagnets
• Ubiquitous order-disorder transition in the Mn antisite sublattice of the (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_n$ magnetic topological insulators
• Effect on the Electronic and Magnetic Properties of Antiferromagnetic Topological Insulator MnBi${}_2$Te${}_4$ with Sn Doping
• Charge Carrier Mediation and Ferromagnetism induced in MnBi6Te10 Magnetic Topological Insulators by antimony doping
• Magnetic warping in topological insulators
• Charge-density wave transition in magnetic topological semimetal EuAl${}_4$
• Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions
• Intermediate anomalous Hall states induced by noncollinear spin structure in magnetic topological insulator MnBi2Te4
• Finite temperature fluctuation-induced order and responses in magnetic topological insulators
• Large-gap quantum anomalous Hall states induced by functionalizing buckled Bi-III monolayer/Al${}_2$O${}_3$
• Rich unconventional Hall effects in a single quasi-kagome Kondo Weyl semimetal candidate Ce${}_3$TiSb${}_5$
• Coulomb field correction due to virtual $e^{+}{e}^{-}$ production in heavy ion collisions
• Role of non-magnetic spacers in the magnetic interactions of antiferromagnetic topological insulators MnBi${}_4$Te${}_7$ and MnBi${}_2$Te${}_4$
• Single-layer magnet phase in intrinsic magnetic topological insulators, $[\mathrm{MnTe}][{\mathrm{Bi}}_2{\mathrm{Te}}_3{]}_{\mathrm{n}}$, far beyond the thermodynamic limit
• Universal negative magnetoresistance in antiferromagnetic metals caused by symmetry breaking of electron wave functions
• Synthesis of intrinsic magnetic topological insulator MnBi2nTe3n+1 family by chemical vapor transport method with feedback regulation