Magnetic properties of a hexagonal prismatic nanoparticle with ferrimagnetic core-shell structure

Based on Monte Carlo simulation a hexagonal prismatic nanoparticle consisting of a ferromagnetic core of spin-1 surrounded by a ferromagnetic shell of spin-3/2 with ferrimagnetic interface exchange coupling has been investigated. Curves of magnetizations, magnetic susceptibilities, internal energy of the system and phase diagrams are obtained and discussed in detail. It has shown that exchange couplings and single-ion anisotropies of core and shell sublattice play important roles in magnetic properties of the system. A number of characteristic types of magnetization curves have been plotted. The occupation of shell sublattice by spin-3/2 results in the different initial values of total magnetization. The internal energy of the system shows a different variation when different parameters change. For the appropriate parameters, the nanoparticle may exhibit compensation behavior. Especially, two compensation temperatures have been found in this system. (C) 2015 Published by Elsevier B.V.