학술논문
Meta-magnetism of weakly-coupled antiferromagnetic topological insulators
Document Type
Working Paper
Author
Source
Phys. Rev. Lett. 124, 197201 (2020)
Subject
Language
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.
Comment: 22 pages, 8 figures; typos corrected, references added
Comment: 22 pages, 8 figures; typos corrected, references added