  Janus MXenes, a new category of two-dimensional (2D) materials, shows
promising potential for advances in optoelectronics, spintronics and
nanoelectronics. Our theoretical investigations not only provide interesting
insights but also highlight the promise of Janus MCrCT$_2$ (M = Ti, Mo; T = O,
F, OH) MXenes for future spintronic applications and highlight the need for
their synthesis. Electronic structure analysis shows different metallic and
semi-metallic properties: MoCrCF$_2$ exhibits metallic properties,
TiCrC(OH)$_2$ and MoCrCO$_2$ exhibit near semi-metallicity with spin
polarization values of 61\% and 86\%, respectively, while TiCrCO$_2$ and
TiCrCF$_2$ are completely half-metallic with 100\% spin polarization at the
Fermi level. All studied Janus MXenes exhibit intrinsic ferromagnetism, which
is mainly attributed to the chromium (Cr) atoms, as shown by the spin density
difference plots. Among them, the TiCrCO$_2$ monolayer stands out with the
highest exchange constant and ferromagnetic transition temperature (T$_c$).
Notably, the O-terminated Janus MXenes exhibit weak perpendicular magnetic
anisotropy, in contrast to the in-plane anisotropy observed for F and
OH-terminated MXenes, making them particularly interesting for future
spintronic applications which we further demonstrate with micromagnetic
simulation which reveal distinct current-induced switching behaviors in these
Janus MXenes with different surface terminations.
