Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coexisting Ferromagnetic-antiferromagnetic Phase and Manipulation in
  Magnetic Topological Insulator MnBi4Te7   Magnetic topological insulators (MTIs) have received a lot of attention due
to the existence of various quantum phenomena such as quantum anomalous Hall
effect (QAHE) and topological magnetoelectric effect, etc. The intrinsic
superlattice-like layered MTIs, MnBi2Te4/(Bi2Te3)n, have been extensively
investigated mainly through the transport measurements, while the direct
investigation of their superlattice-sensitive magnetic behaviors is relatively
rare. Here, we report a microscopic real-space investigation of magnetic phase
behaviors in MnBi4Te7 using cryogenic magnetic force microscopy (MFM). The
intrinsic robust A-type antiferromagnetic (AFM), and emerged surface spin-flop
(SSF), canted AFM (CAFM), ferromagnetic (FM)+CAFM, forced FM phases are
sequentially visualized via the increased external magnetic field, in agreement
with the metamagnetic behavior in the M-H curve. The temperature-dependent
magnetic phase evolution behaviors are further investigated to obtain the
complete H-T phase diagram of MnBi4Te7. The tentative local phase manipulation
via the stray field of the magnetic tip is demonstrated by transforming the AFM
to FM phase in its surface layers of MnBi4Te7. Our study the not only provide
key real-space ingredients for understanding their complicated magnetic,
electronic, and topological properties of these intrinsic MTIs, but also
suggest new directions for manipulating spin textures and locally controlling
their exotic properties.

37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int