二维磁性材料是当前凝聚态物理的研究热点。近来的实验发现双层CrI3 存在与三维块体 不同的层间反铁磁序，表现出独特的量子限域效应和潜在的器件应用，受到了人们的广泛关注。大 量的研究表明层间磁序跟堆垛密切相关，但仍存在争议。本文主要综述双层磁性材料层间磁序及 其应用的研究进展，重点介绍了磁性与堆垛方式之间的关联，指出了密度泛函理论在层间磁性机 理研究中存在的挑战，阐述了层间磁序相关的器件应用，并对未来可能的研究方向进行了展望。

Two-dimensional magnetic materials are the focus of condensed matter physics. Recent experiments have found that bulk CrI3 shows an interlayer ferromagnetic order, whereas its bilayer possesses interlayer antiferromagnetism, which shows the quantum confinement effect and potential device applications, and has attracted widespread attention. Many studies have shown that interlayer magnetism is closely related to stacking order, but it is still controversial. This paper reviews the main research on the interlayer magnetism of bilayer transition metal trihalides and its application. Firstly, we introduced the relationship between the interlayer magnetism and stacking order, and then pointed out the density functional theory’s challenges in describing the interlayer magnetic mechanism. Finally, we expounded on the interlayer magnetism-related device applications and proposed the future research direction.