Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiferroic properties of oxygen functionalized magnetic i-MXene   Two dimensional multiferroics inherit prominent physical properties from both
low dimensional materials and magnetoelectric materials, and can go beyond
their three dimensional counterparts for their unique structures. Here, based
on density functional theory calculations, a MXene derivative, i.e., i-MXene
(Ta$_{2/3}$Fe$_{1/3}$)$_2$CO$_2$, is predicted to be a type-I multiferroic
material. Originated from the reliable $5d^0$ rule, its ferroelectricity is
robust, with a moderate polarization up to $\sim12.33$ $\mu$C/cm$^2$ along the
a-axis, which can be easily switched and may persist above room temperature.
Its magnetic ground state is layered antiferromagnetism. Although it is a
type-I multiferroic material, its N\'eel temperature can be significantly tuned
by the paraelectric-ferroelectric transition, manifesting a kind of intrinsic
magnetoelectric coupling. Such magnetoelectric effect is originated from the
conventional magnetostriction, but unexpectedly magnified by the exchange
frustration. Our work not only reveals a nontrivial magnetoelectric mechanism,
but also provides a strategy to search for more multiferroics in the two
dimensional limit.

32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg