Hard ferromagnetic behavior in atomically thin CrSiTe<sub>3</sub> flakes
Cheng Zhang, Le Wang, Yue Gu, Xi Zhang, Xiuquan Xia, Shaolong Jiang, Lianglong Huang, Ying Fu, Cai Liu, Junhao Lin, Xiaolong Zou, Huimin Su, Jia‐Wei Mei, Junfeng Dai
Abstract
shows a rectangular loop with finite magnetization and coercivity as the thickness decreases down to ∼8 nm, indicative of a single-domain and out-of-plane ferromagnetic order. We find that the stray field is weakened with decreasing thickness, which suppresses the formation of the domain wall. In addition, thickness-dependent ferromagnetic properties also reveal a crossover from 3 dimensional to 2 dimensional Ising ferromagnets, accompanied by a drop of the Curie temperature from 33 K for bulk to ∼17 K for the 4 nm sample. Our study paves the way towards exploring and learning much more about atomically thin and layered intrinsic ferromagnets.