  Generally the adiabatic quantum pumping phenomenon can be interpreted by the
surface integral of the Berry curvature inside the cyclic loop. Spin angular
momentum flow without charge current can be pumped out by magnetization
precession in ferromagnet-based structures. When an electron is scattered by a
helimagnet, spin-dependent diffraction occurs due to the spatial modulation of
the spiral. In this work, we consider the charge and spin flow driven by
magnetization precession in normal-metal/multiferroic-helimagnet/ferromagnet
heterostructures. The pumping behavior is governed by the diffracted states.
Gauge dependence in the pumped current was encountered, which does not occur in
the static transport properties or pumping behaviors in other systems.
