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.
Origine | Fichiers produits par l'(les) auteur(s) |
---|
Loading...