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Article Dans Une Revue Physical Review Letters Année : 2020

Metamagnetism of weakly-coupled antiferromagnetic topological insulators

Méta-magnétisme d'isolants topologiques 3D magnétiques faiblement couplés

Résumé

The magnetic properties of the van der Waals magnetic topological insulators MnBi2Te4 and MnBi4Te7 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.
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Dates et versions

hal-02457539 , version 1 (28-01-2020)

Identifiants

  • HAL Id : hal-02457539 , version 1

Citer

Aoyu Tan, Valentin Labracherie, Narayan Kunchur, Anja U B Wolter, Joaquin Cornejo, et al.. Metamagnetism of weakly-coupled antiferromagnetic topological insulators. Physical Review Letters, 2020, 124 (197201). ⟨hal-02457539⟩
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