Abstract
We study the magnetic properties of a system which is composed of 2 layers of ferromagnetic and antiferromagnetic materials in the presence of applied magnetic field. Schwinger-Boson Mean Field Theory (SBMFT) is used to study the properties of this system. The results of pure antiferromagnet and ferromagnet are reproduced. We find that their magnetic susceptibilities agrees with the traditional theory like Curie and Curie-Weiss law pretty well. The effect of placing the ferromagnet and antiferromagnet on the top of each other was also be studied. In this way, we have investigated the temperature dependence of magnetic susceptibility and the applied magnetic field dependence of magnetization. The results are compared with experiments whenever possible.