Hysteresis loops and susceptibility of ferromagnetic or ferrimagnetic bilayer system

Abstract

PACS 75.10. Dg, 75.10.Hk, 75.40.Mg, 75.60.Ej The hysteresis loops and susceptibility of a ferromagnetic or ferrimagnetic bilayer system consisting of two magnetic monolayers (A and B) with different spins (S A = 1/2 and S B = 3/2) in the presence of the crystal field in the monolayer B have been studied. Within the effective-field theory based on the differential operator technique, the effects of the external longitudinal magnetic field on the magnetization and susceptibility of the honeycomb lattice are discussed in detail. We show that by choice of the temperature the hysteresis loops can be varied over a very wide range.

Monte Carlo simulation of step effect on molecular‐based magnets

“…This suggests a lower temperature tends to make the step effect. These results have the same tendency with other works [18,19,21,31]. Figure 7a and b shows the effect of the single-ion anisotropies D A and D B on the coercivity H c of the system at different temperatures, respectively.…”

“…These above works showed that the step effect could be attributed to different anisotropies, exchange couplings, clusters with different size, and temperature. In our previous works, the magnetic properties and hysteresis behavior for a ferrimagnetic mixed spin-2 and spin-5/2 Ising system were also studied by using EFT [28][29][30][31]. However, less attention has been paid to the lowtemperature properties of a ferrimagnetic mixed spin-2 and spin-5/2 Ising system on a honeycomb lattice with the effect of longitudinal magnetic field, single-ion anisotropy and exchange coupling by MC simulation.…”

Magnetic Properties of a Mixed-Spin-3/2 and Spin-2 Ising Ferrimagnetic System in an Applied Longitudinal Magnetic Field

“…The thermodynamic and magnetic properties of a mixed Ising system on a triangular array in the presence of longitudinal magnetic field were investigated by Aouzi et al by using EFT with correlations [27]. Jiang and Bai also studied the influences of an external longitudinal magnetic field on the magnetic properties of mixed spin-1/2 and spin-3/2 Ising ferromagnetic or ferrimagnetic bilayer system [28]. The Magnetic properties of an anti-ferro-magnetic and ferrimagnetic mixed spin-1/2 and spin-5/2 Ising model in the longitudinal magnetic field and the Magnetic Properties of a Mixed Spin-3/2 and Spin-2 Ising Ferrimagnetic System within the Effective-field Theory are studied by Bayram Deviren et al by using the effective-field theory with correlations [29,30] and the results show that the longitudinal magnetic field plays an important role in the magnetic properties of the mixed spin Ising systems.…”

Magnetic hysteresis loop in antiferromagnetically coupled bilayer structures

“…(3a) and (3b), we can obtain the magnetization (3c) and hysteresis loops of the bilayer system. A similar process has been used in the effective field theory to calculate the hysteresis of the bilayer Ising model [11][12][13]. Here, we will discuss the influences of the anisotropy D 2 /J 1 and intralayer coupling J 2 /J 1 in soft magnetic layers and the interlayer coupling J 12 /J 1 on the hysteresis of system.…”

“…In Refs. [11][12][13], using the effective field theory, they calculate the hysteresis loops in the ferromagnetic or ferrimagnetic bilayer Ising model, but the exchangebias phenomenon is not found within their parameter zone. In this work, we will use the Ising model to describe the bilayer system, and study the hysteresis behavior.…”