Energy of different stacking way for RuClBr/Ga2S3-P(↓) and RuClBr/Ga2S3-P(↑); The most stable configuration of RuClBr/Ga2S3-P(↓) and RuClBr/Ga2S3-P(↑), respectively. Diagram of the isotropic Heisenberg exchange coefficients J1, J2, and J3. Clockwise (CW) and anticlockwise (ACW) spin configurations in the X-Z plane. four spin configurations including one ferromagnetic state (FM) and three antiferromagnetic states (AFM). The global MAE of RuClBr/Ga2S3-P(↑) and RuClBr/Ga2S3-P(↓).