▎ 摘　　要

Using Monte Carlo simulations, we study the magnetic properties of a bi-layer decorated graphene structure. We elaborate the ground state phase diagrams corresponding to very low values of the reduced temperature. The partial magnetizations are deduced and compared to those of the ground state phase diagrams at very low temperatures. We found that, from 7 x 8 = 56 possible configurations, only 22 configurations are stable in different planes of the ground state phase diagrams. Moreover, and due to strong exchange coupling interactions, the critical temperature values increase when increasing the reduced exchange coupling interaction values. We presented and discussed the magnetic hysteresis cycles, for different reduced parameter values. We have analyzed the magnetic properties of a bi-layer decorated graphene structure. We have showed the existence of a critical temperature, depending on a number of parameters. We showed the occurrence of a single hysteresis loop for appropriate values of the system parameters. (C) 2016 Elsevier B.V. All rights reserved.