  Hexagonal ferrites (h-RFeO$_3$, R=Y, Dy-Lu) have recently been identified as
a new family of multiferroic complex oxides.
  The coexisting spontaneous electric and magnetic polarizations make
h-RFeO$_3$ rare-case ferroelectric ferromagnets at low temperature.
  Plus the room-temperature multiferroicity and predicted magnetoelectric
effect, h-RFeO$_3$ are promising materials for multiferroic applications.
  Here we review the structural, ferroelectric, magnetic, and magnetoelectric
properties of h-RFeO$_3$.
  The thin film growth is also discussed because it is critical in making high
quality single crystalline materials for studying intrinsic properties.
