Monte Carlo Investigation of the Magnetic and Thermal Properties of Four Sublattice Ferromagnetic– Antiferromagnetic Double-Layer Superlattices

Abstract

Using Monte Carlo simulation, we have studied the magnetic and thermal properties of a four sublattice ferromagnetic (FM) and anti-FM (AFM) double-layer superlattices system in a longitudinal magnetic field. The effects of the intralayer AFM exchange coupling $J_{{2}}$ , the single-ion anisotropy ${D}$ and the longitudinal magnetic field ${h}$ on the magnetization ${M}$ , the susceptibility ${x}$ , the internal energy ${U}$ , and the specific heat ${c}$ of the system are discussed in detail. Particular attention has been paid to the variations of the hysteresis loops of the system with the AFM exchange coupling $J_{ {2}}$ and the anisotropy ${D}$ . Some interesting results, such as the triple hysteresis and the exchange bias behavior, have been found under certain conditions.