Electric field tunable magnetic phase transition and magneto-optical effects in two-dimensional multiferroic Ti2F3 semiconductor

Abstract

Two-dimensional single-phase magnetoelectric multiferroic semiconductors are attractive for the multifunctional spintronic nanodevices due to their cross coupling between coexisting magnetic and ferroelectric orders. However, experimentally synthesized two-dimensional magnetoelectric multiferroic materials are very rare to date because of the mutual exclusion between ferroelectricity and magnetism. Here, we predict a two-dimensional room-temperature ferromagnetic multiferroic Ti2F3 semiconductor through the first-principles calculations and Monte Carlo simulations. The Ti2F3 monolayer manifests an easy magnetization plane, and the magnitude of the out-of-plane polarization is 0.037 C/m2. Interestingly, the magnetic ground states of the Ti2F3 monolayer can be tuned by the electric field. Moreover, we explore the electric field tunable magneto-optical effects in the Ti2F3 monolayer. Our work provides more magnetoelectric multiferroic candidate materials and suggests an effective strategy to realize and probe the magnetic phase transition.