Investigation by means of the NMR-method of formation conditions for nonmagnetic conglomerates in colloid solutions of paramagnetic nanoparticles

The dependence of magnetization colloid solution of paramagnetic particles J on time, when solution is placed in magnetic field, with induction, was investigated. After quick increase of induction to magnetization increases, further if magnetization decreases with 10 min. The effect is explained by the formation of nanoparticles conglomerates with antiferromagnetic character of relative orientation of their magnetic moments. The value contents of the condition, where - magnetic moment of nanoparticles, T - temperature of sample. The reducing of magnetization is observed on the stipulation that the induction of the external magnetic field exceeds the boundary value, above which the energy of the magnetic moment of a nanoparticle in the magnetic field becomes more than the energy of its thermal movement.