▎ 摘　　要

In this work, we used the mean-field approximation to investigate the magnetic properties and hysteresis behavior of the ferromagnetic spin-3/2 Blume-Capel model in a graphene monolayer. The effects of crystal field, external magnetic field, and temperature on the system's magnetizations, phase diagram, and hysteresis loops were examined. Exciting results have been obtained, particularly second- and first-order phase transitions, critical points, and multi-loop hysteresis phenomena.