  An electric current in the presence of spin-orbit coupling can generate a
spin accumulation that exerts torques on a nearby magnetization. We demonstrate
that, even in the absence of materials with strong bulk spin-orbit coupling, a
torque can arise solely due to interfacial spin-orbit coupling, namely
Rashba-Eldestein effects at metal/insulator interfaces. In magnetically soft
NiFe sandwiched between a weak spin-orbit metal (Ti) and insulator
(Al$_2$O$_3$), this torque appears as an effective field, which is
significantly larger than the Oersted field and sensitive to insertion of an
additional layer between NiFe and Al$_2$O$_3$. Our findings point to new routes
for tuning spin-orbit torques by engineering interfacial electric dipoles.
