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

Abstract

The dynamic magnetic behavior of the kinetic metamagnetic spin-5/2 Blume-Capel model is examined, within a mean-field approach, under a time-dependent oscillating magnetic field. To describe the kinetics of the system, Glaubertype stochastic dynamics has been utilized. The mean-field dynamic equations of the model are obtained from the Master equation. Firstly, these dynamic equations are solved to find the phases in the system. Then, the dynamic phase transition temperatures are obtained by investigating the thermal behavior of dynamic sublattice magnetizations. Moreover, from this investigation, the nature of the phase transitions (first-or second-order) is characterized. Finally, the dynamic phase diagrams are plotted in five different planes. It is found that the dynamic phase diagrams contain the paramagnetic (P), antiferromagnetic (AF 5/2 , AF 3/2 , AF 1/2 ) phases and five different mixed phases. The phase diagrams also display many dynamic critical points, such as tricritical point, triple point, quadruple point, double critical end point and separating point.

Monte Carlo study of the phase diagram of layered XY antiferromagnet

“…We note that, among the many metamagnets, three of the most studied are F eBr 2 , F eI 2 and F eCl 2 . In addition to the equilibrium properties, many studies have been devoted to elucidate the nonequilibrium features of the metamagnetic systems driven by a time dependent magnetic field [29][30][31][32].…”

The dynamic magnetic behaviors of the Blume–Capel Ising bilayer system

“…Therefore, further efforts on these challenging time-dependent problems, especially calculating the DPT points and constructing the phase diagram, should promise to be rewarding in the future. Hence, the DPT in an oscillating external magnetic field has attracted considerable attention in recent literature, theoretically (see [34][35][36][37][38][39] and references therein) and analytically [40,41]. Moreover, experimental evidence for the DPT has been reported in polyethylene naphthalate (PEN) nanocomposites, in amorphous ultrathin Co films, cuprite superconductors, [Co/Pt] 3 magnetic multilayers, etc.…”