  In the dual-phase model of interacting nanoparticles stretching leads to a
decrease in both coercive force $H_c$ and saturation remanence $I_{rs}$, and
compression - to their growth. Magnetostatic interaction between particles also
decreases both $H_c$ and $I_{rs}$. Theoretical analysis was carried out in the
framework of the dual-phase system of interacting particles on the example of
nanoparticles $\gamma$-$Fe_2O_3$, epitaxially coated with cobalt.
