Mixed-spin Ising model and compensation temperature

Dynamic compensation temperature in the kinetic spin-1 Ising model in an oscillating external magnetic field on alternate layers of a hexagonal lattice

“…Moreover, if one increases J 2 values, the af phase region becomes larger. We have found a phase diagram similar to the one seen in the mixed spin-1/2 and spin-1 Ising system [15] and in the mixed spin-1/2 and spin-3/2 Ising model on alternate layers of a hexagonal lattice [26]. For J 1 ¼ À1, J 3 ¼ 0.8, H 0 ¼ 0.1 and D ¼ À1.5, the phase diagram is seen in Fig.…”

“…The hatched region with the grey color is the af phase region where the compensation effect exists; hence the total dynamic magnetization vanishes. We have found a phase diagram similar to the one seen in the mixed spin-1/2 and spin-1 Ising system [15]. Fig.…”

“…From these studies, we found following new results: (1) we obtained six new phase diagrams, namely Figs. 5(a)-(c), 6(b) and 7(b) and (c) in which, best of our knowledge, they have not been obtained in the layered kinetic Ising systems [15,26]. (2) The system exhibits the p, af fundamental phases and/or the p+af and nm+p mixed phases depending on the interaction parameters.…”

“…Moreover, the compensation temperatures of the mixed Ising ferrimagnetic system have been examined on the Bethe lattice by using the exact recursion equations [14]. Godoy et al [15] studied the dynamic compensation temperature in the mixed Ising systems, where s ¼ 1/2 and S ¼ 1 spins occupy alternate layers of a hexagonal lattice by the dynamic mean-field calculations and the dynamic Monte-Carlo simulations. They have found that the compensation point is appeared only when the intrasublattice interaction between spins in the s sublattice was ferromagnetic.…”

Magnetization and magnetic susceptibility of the Ising ferromagnetic/antiferromagnetic superlattice

“…Using the same model but the mean-field-type calculations, Scholten et al [23] calculated the coercive field and the EB field, and found the different origins of the enhancement of the coercivity around T N and the occurrence of EB. Using the Ising model composed of alternate chains of spin-1/2 and -1 lying on a plane forming a hexagonal lattice and Monte Carlo simulation and mean-field calculation, Godoy et al [24] calculated the sublattice magnetizations and the specific heats, found the compensation point of the model and discussed the dependence of the compensation point on the parameters of the system.…”