  Based on density functional theory calculations, we investigated the
two-dimensional in-plane ordered MXene (i-MXenes), focusing particularly on the
magnetic properties. It is observed that robust two-dimensional magnetism can
be achieved by alloying nonmagnetic MXene with magnetic transition metal atoms.
Moreover, both the magnetic ground states and the magnetocrystalline anisotropy
energy of the i-MXenes can be effectively manipulated by strain, indicating
strong piezomagnetic effect. Further studies on the transport properties reveal
that i-MXenes provide an interesting playground to realize large thermoelectric
response, antiferromagnetic topological insulator, and spin-gapless
semiconductors. Thus, i-MXenes are a new class of multifunctional
two-dimensional magnetic materials which are promising for future spintronic
applications.
