Magnetic properties of a Dendrimer structure with RKKY interactions

•A Dendrimer structure has been studied containing non-magnetic layers.•The RKKY interactions have been applied to investigate the magnetic properties.•The Monte Carlo simulations are performed to study this system.•The critical temperature is obtained and discussed.•The hysteresis cycles have established and explained.

Using Monte Carlo simulations, we study in this paper the effect of the RKKY interactions for a multi-layer Dendrimer structure formed with spin-5/2 in the Blume-Capel model. The studied system is formed by two magnetic layers, separated by a number of non-magnetic layers. The total susceptibility peaks correspond to the reduced critical temperature TC/J. This critical temperature is displaced towards the lower temperatures. This is due to the fact that the increase of the number of non-magnetic layers increases the effect of the RKKY interactions. Hence, the system becomes disorder when increase the number of non-magnetic layers. For increasing values of the number of non-magnetic layers, the total magnetizations oscillate between the two saturation values: −5/2 and +5/2, when the reduced crystal field increases. We have interpreted the behaviors of the magnetic hysteresis for this model.