Ferrielectric properties of a bilayer structure with RKKY-like interaction: A Monte Carlo study

Abstract The ferrielectric properties of a bilayer structure separate by non magnetic layers, with RKKY interactions in the Blume–Capel model. The system is composed of two interacting A (spin S=5/2) and B (spin σ = 2 ) planes in which the intralayer couplings are ferromagnetic while the interlayer interactions are antiferromagnetic. The temperature dependence of the ferroelectricity of a bilayer structure separate by non magnetic layers, with RKKY interactions in the Blume–Capel model has been investigated. The effects of external longitudinal electric ( E Z ) and crystal anisotropy D A and D B fields have been investigated. On the other hand, the variation of total and partial polarizations with exchange coupling interactions J A , J B , J RKKY crystal and magnetic external fields was discussed. Finally, the influence of the exchange interactions and crystal filed on the critical temperatures of the system and hysteresis cycles has been examined.