论文标题
2D反铁磁异质结构中电场可调界面的界面界面铁磁性的出现
Emergence of electric-field-tunable interfacial ferromagnetism in 2D antiferromagnet heterostructures
论文作者
论文摘要
Van der waals（VDW）磁铁异质结构已成为探索外来磁性和量子现象的新平台。在这里，我们分别研究了分层的抗铁磁体，CRI3和CRCL3的异质结构，分别具有垂直和平面磁各向异性。使用磁光kerr效应显微镜，我们证明了与CRI3近端的CRCL3层中的平面外磁顺序，两者之间的铁磁界面耦合。这样的层间交换场导致的临界温度高于仅CRI3或CRCL3的温度。我们进一步证明了对固定性的明显电场控制，这归因于异质结构的自然断裂结构反演对称性，从而使电场和界面磁性之间的空前直接耦合。这些发现说明了在VDW异质结构中探索异国情调磁相和工程师Spintronic设备的机会。
Van der Waals (vdW) magnet heterostructures have emerged as new platforms to explore exotic magnetic orders and quantum phenomena. Here, we study heterostructures of layered antiferromagnets, CrI3 and CrCl3, with perpendicular and in-plane magnetic anisotropy, respectively. Using magneto-optical Kerr effect microscopy, we demonstrate out-of-plane magnetic order in the CrCl3 layer proximal to CrI3, with ferromagnetic interfacial coupling between the two. Such an interlayer exchange field leads to higher critical temperature than that of either CrI3 or CrCl3 alone. We further demonstrate significant electric-field control of the coercivity, attributed to the naturally broken structural inversion symmetry of the heterostructure allowing unprecedented direct coupling between electric field and interfacial magnetism. These findings illustrate the opportunity to explore exotic magnetic phases and engineer spintronic devices in vdW heterostructures.
