▎ 摘　　要

We have studied the magnetic properties of the mixed spin sigma = +/- 3/2, +/- 1/2 and spin S = +/- 5/2, +/- 3/2, +/- 1/2 Ising ferrimagnetic system in a graphene layer by means of Monte Carlo simulations. The effects of next-nearest neighbors exchange interactions and crystal field anisotropy on the critical and compensation behavior of the system have been investigated. The results show that, for a system with given values of the crystal field anisotropy and exchange interaction constants, a compensation point only exists if the values of the spins in the ground state are such that vertical bar S vertical bar > vertical bar sigma vertical bar and J(sigma) is higher than a certain value J(sigma)(min). It was shown that the relationship between J(sigma)(min) and J(S) is linear for a given value of the crystal field constant. The compensation and the critical temperature are very sensitive to the change of J(S) and J(sigma), respectively, while the crystal field anisotropy affects both temperatures to a large extent.