Deformation twinning of the ferromagnetic single crystal of $\mathrm{Ni_2MnGa}$ with the shape memory effect

The features of the shape of lenticular twins, twin interlayers, as well as secondary wedge-shaped twins in a single crystal $\mathrm{Ni_2MnGa}$ are studied. The mechanisms of exposure to each other twins with different twinning systems are analyzed. It has been established that at the boundaries and vertices of twins the wedge-shaped counterparts of the second order are formed.