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.