Abstract IIn this work, we investigate the magnetic behavior of a mixed-spin Ising ferrimagnetic system consisting of spins σi = ±5/2, ±3/2,±1/2 and Sj = ±1,0 , arranged on a monolayer graphene structure. Using a mean field approximation (MFA), we analyse the dependence of the magnetic properties and the phase diagrams on the Hamiltonian parameters such as exchange couplings and single-ion anisotropies. Our results reveal a variety of phase transitions, including both second-order and first-order types, as well as the presence of compensation phenomenon. The phase diagrams obtained reflect the rich and complex magnetic behavior induced by the interplay of spin values and interaction parameters, providing useful insights into low-dimensional ferrimagnetic systems.
Karima El Kihel (2025) studied this question.