Magnetic properties of NiCl2 nanostructures

We show that the magnetic properties of antiferromagnetic layered NiCl2 can be altered under nanosizing depending on dimensionality and morphology type of the corresponding nano-forms. By means of Monte-Carlo simulations within classical Heisenberg model, the spin ordering, magnetic part of heat capacity Cv and Néel temperatures TN for multi-walled NiCl2 nanotubes and a fullerene were calculated and analyzed in comparison with the bulk NiCl2 and multilayered two-dimensional NiCl2 crystals and nanostripes. We have found that the nanostructuring of NiCl2 at the size reducing and at the formation of the closed structures can influence propitiously on the preservation of antiferromagnetic properties and the suppression of superparamagnetic limit.