  The theoretical analysis of the effect of uniaxial stress on the
magnetization of the system of noninteracting nanoparticles is done by an
example of heterophase particles of maghemite, epitaxially coated with cobalt
ferrite. It is shown that stretching leads to a decrease in the coercive force
$H_c$, and compression leads to its growth. The residual saturation
magnetization $I_{rs}$ of nanoparticles does not change. With increasing of
interfacial exchange interaction, coercive force varies nonmonotonically
