The work presents the results of the study of the structural parameters and magnetic properties of inverse spinel CoFe 2 O 4 and the composite 0.4CoFe 2 O 4 -0.6PbTiO 3 both before and after nanostructuring using the method of mechanical activation with the help of Bridgman anvils. The study has found that this process leads to changes in the parameters of elementary cells and the parameters of magnetic hysteresis loops. It has been shown that nanostructuring of the synthesized composition (1-x)CoFe 2 O 4 -xPbFe 12 O 19 using the method of intense force in combination with shear deformation allows to control the parameters of the physical properties of these compositions. This method can be applied to control the physical properties of any crystalline bodies over a wide range.