Spin mapping of intralayer antiferromagnetism and field-induced spin reorientation in monolayer CrTe2
Jing-Jing Xian, Cong Wang, Jin‐Hua Nie, Rui Li, Mengjiao Han, Junhao Lin, Wenhao Zhang, Zhenyu Liu, Zhimo Zhang, Mao-Peng Miao, Yangfan Yi, Shiwei Wu, Xiaodie Chen, Junbo Han, Zhengcai Xia, Wei Ji, Ying‐Shuang Fu
Abstract
Abstract Intrinsic antiferromagnetism in van der Waals (vdW) monolayer (ML) crystals enriches our understanding of two-dimensional (2D) magnetic orders and presents several advantages over ferromagnetism in spintronic applications. However, studies of 2D intrinsic antiferromagnetism are sparse, owing to the lack of net magnetisation. Here, by combining spin-polarised scanning tunnelling microscopy and first-principles calculations, we investigate the magnetism of vdW ML CrTe 2 , which has been successfully grown through molecular-beam epitaxy. We observe a stable antiferromagnetic (AFM) order at the atomic scale in the ML crystal, whose bulk is ferromagnetic, and correlate its imaged zigzag spin texture with the atomic lattice structure. The AFM order exhibits an intriguing noncollinear spin reorientation under magnetic fields, consistent with its calculated moderate magnetic anisotropy. The findings of this study demonstrate the intricacy of 2D vdW magnetic materials and pave the way for their in-depth analysis.