The dynamic compensation temperature in a kinetic spin-5/2 Ising model on a hexagonal lattice

Abstract

We present a study of the dynamic behavior of a two-sublattice spin-5/2 Ising model with bilinear and crystal-field interactions in the presence of a time-dependent oscillating external magnetic field on alternating layers of a hexagonal lattice by using the Glauber-type stochastic dynamics. The lattice is formed by alternate layers of spins σ = 5/2 and S = 5/2. We employ the Glauber transition rates to construct the mean-field dynamic equations. First, we investigate the time variations of the average sublattice magnetizations to find the phases in the system and then the thermal behavior of the dynamic sublattice magnetizations to characterize the nature (first- or second-order) of the phase transitions and to obtain the dynamic phase transition (DPT) points. We also study the thermal behavior of the dynamic total magnetization to find the dynamic compensation temperature and to determine the type of the dynamic compensation behavior. We present the dynamic phase diagrams, including the dynamic compensation temperatures, in nine different planes. The phase diagrams contain seven different fundamental phases, thirteen different mixed phases, in which the binary and ternary combination of fundamental phases and the compensation temperature or the L-type behavior strongly depend on the interaction parameters.

Nonequilibrium behavior of the kinetic metamagnetic spin-5/2 Blume—Capel model

“…spins [28,49,[56][57][58]. On the other hand, the dynamic phase diagrams in Figs.4(b)-4(e), 5(b)-5(e), 6(c)-6(e), and 7(c)-7(e) are new phase diagrams, which were obtained for only this system.d d d d d…”

“…There have been only few studies on the dynamical aspects of the model. [44][45][46][47][48][49] To the best of the author's knowledge, the dynamic mag-netic behavior of the metamagnetic spin-5/2 Ising model has not been studied so far. The purpose of this work is to study the nonequilibrium behavior of the kinetic metamagnetic spin-5/2 Ising model with bilinear (J) and crystal-field interactions (D) under the time-dependent oscillating external magnetic field.…”

Random crystal field effect on hysteresis loops and compensation behavior of mixed spin-(1,3/2) Ising system

“…By both three-dimensional (3D) and one-dimensional (1D) micromagnetic calculations, the effect of exchange coupling on magnetic property in Sm-Co/α-Fe layered system was examined, [22] the generalized theoretical approach is applied to evaluate the negative magnetoresistivity of ErBi in external magnetic fields. [23] Applying the mean-field approach, magnetic properties of rareearth antiferro-nanoparticle, [24] two-sublattice with alternate layers, [25] TbNi 2 B 2 C with a two-sublattice model, [26] and the bilayer system [27] were discussed. By means of the effectivefield theory, phase diagrams and magnetic properties in the mixed Ising system with two alternative layers, [28] hexag-onal and ferrimagnetic Ising nanowire, [19,29] and ferrimagnetic Ising System with a random longitudinal field [30] were studied.…”