Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meta-magnetism of weakly-coupled antiferromagnetic topological
  insulators   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.

7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin