  We theoretically study the spin Hall effect in a simple tight-binding model
of stacked-kagome Weyl semimetal Co3Sn2S2 with ferromagnetic ordering. We focus
on the two types of the spin Hall current: one flowing in the in-plane
direction with respect to the kagome lattice (in-plane spin Hall current), and
one flowing in the stacking direction (out-of-plane spin Hall current). We show
the spin Hall conductivities for those spin currents drastically change
depending on the direction of the magnetic moment. Especially, the out-of-plane
spin Hall current may induce surface spin accumulation, which are useful for
the perpendicular magnetization switching via spin-orbit torque.
