Theoretical prediction of two-dimensional ferromagnetic MnX (X = As, Sb) with strain-controlled magnetocrystalline anisotropy.

Two-dimensional (2D) magnetic materials with large and tunable magnetocrystalline anisotropy (MCA) provide unique opportunities to develop various spintronic devices. We, herein, propose an experimentally feasible 2D material platform, MnX (X = As, Sb), which is a family of intrinsic ferromagnet. Using first-principles calculations, we show that 2D MnX (X = As, Sb) with a robust ferromagnetic ground state exhibits not only a large perpendicular magnetic anisotropy (PMA), but also significant strain-driven modulation behaviors under external biaxial strain.

Intrinsic ferromagnetism in two-dimensional 1T-MX monolayers with tunable magnetocrystalline anisotropy.

Two-dimensional (2D) ferromagnetic materials with tunable magnetocrystalline anisotropy (MCA) provide unique opportunities for developing the next-generation data-storage and information devices. Herein we systematically investigate the electronic and magnetic properties of the 1T-MX (M = Cr, Mn, Fe, Co; X = As, Sb) monolayers, and identify the stable 2D ferromagnets as well as their MCA energies. Notably, the results demonstrate that the biaxial strain and carrier doping effects have a significant influence on their magnetic behaviors.