  Thermoelectric transport across
normal-metal/helical-multiferroic/ferromagnetic heterojunctions is
theoretically investigated. We find a anisotropic charge and spin thermopower
with a $C_{2v}$ symmetry. The angular dependence on the magnetization
orientation of the ferromagnetic layer is substantiated by a phenomenological
theory based on the symmetry of the effective spin-orbit interaction induced by
the topology of the spiral magnetic order in the multiferroic barrier.
