Magnetic and thermodynamic properties of thin films superlattice: A Monte Carlo study

Abstract

In this paper, the thermodynamic, magnetic properties and magnetocaloric effect of three-layers thin films superlattice(A,B,C) formed by (1,3/2,2) mixed spins were investigated via Monte Carlo study. The influence of intralayer, interfacial exchange interactions, thickness of the film and temperature on the magnetization, magnetic susceptibility, internal energy and magnetic specific heat was investigated. The grounds states in various parameters plane are given. The results show that the intralayer and the interfacial interface the exchange couplings, the thickness of the layer and the concentration of atoms have important influences on the magnetization, the susceptibility, the internal energy and the specific heat of the system. The phase diagrams in various parameters planes are obtained and have different impact on critical temperature of the system. The "double peak" and "triple peak" in thermal magnetic susceptibility, magnetic specific heat, normalized magnetic entropy change are obtained. The magnetic hysteresis cycle and normalized magnetic entropy change have been obtained under the effect of couplings and the thickness of the film. In addition, a number of interesting phenomena have been found, such as: double peak and triple peak in susceptibility and specific heat curves, resulting from the difference in temperature dependence of three sublattice magnetization.