Two-dimensional magnetic materials with magnetic anisotropy can form magnetic order under limited temperature in the single-layer limit. Their macroscopic magnetism is closely related to the number of layers and stacking orders, and their magnetic exchange can be regulated by various external fields. These novel properties have endowed 2D magnetic materials with rich physical connotation and potential application value, which has attracted wide attention of researchers¹.

Currently, two-dimensional magnetic materials reported in experiments mainly include transition metal halides, transition metal sulfides, transition metal carbonitides, transition metal phosphorus sulfides, Mn-Bi-Te family, etc. When the system degree is reduced to the single-layer limit, they usually exhibit significantly different magnetic behavior from that of bulk and less layered samples. These single-layer and few-layer magnetic materials are more easily regulated by external means, such as magnetic field, electric field, strain, light, etc. Therefore, the rich and highly adjustable magnetic phenomena of these two-dimensional magnetic materials indicate that they have broad development prospects in the application of two-dimensional devices.

Although a considerable number of intrinsic two-dimensional magnetic materials have been discovered, the related research on them is still in its infancy. The discovery of new mechanisms of magnetic coupling and magnetic regulation of two-dimensional magnetic materials and the design of intrinsic two-dimensional magnetic materials with high magnetic ordered transition temperatures are still challenging frontier scientific issues.