Magnetic properties of the nanostructure obtained by the introduction of magnetite particles into the channels of porous silicon from a colloidal solution of Fe3O4 in kerosene are studied. The temperature dependences of the parameters of these samples are investigated, and their features are established. It is assumed that the magnetic material consists of two fractions, one of which exhibits superparamagnetic behavior, and the second is in a blocked state up to room temperature.