  Neutron diffraction studies of HoFeO$_3$ single crystal were performed under
external magnetic fields. The interplay between the external magnetic field,
Dzyaloshinsky-Moria antisymmetric exchange and isotropic exchange interactions
between Fe and Ho sublattice and inside Fe sublattice provides a rich phase
diagram. As the result of the balance of exchange interactions inside crystal
and external magnetic field we found 8 different magnetic phases, produced or
suppressed by the field.
