Phase diagram of the mixed-spin (1,3/2) Ising ferrimagnetic system with two different anisotropies

摘要

In this work, we have performed Monte Carlo simulations to study phase transitions in a mixed spin-1 and spin-3/2 Ising ferrimagnetic system on the square and cubic lattices and with two different single-ion anisotropies. These lattices are divided in two interpenetrating sublattices with spins S-Ay = 1 (states +/- 1 and 0) on the sublattice A and S-B = 3/2 (states +/- 3=2, +/- 1/2) on the sublattice B. We have used single-ion anisotropies DA and DB acting on the sites of the sublattice A and B, respectively. We have determined the phase diagrams of the model in the temperature T vs. the single-ion anisotropies strength DA and DB plane and shown that the system exhibits both second- and first-order phase transitions. This system also displays compensation points for some values of the anisotropies.