  We report measurements of the thickness and temperature (T) dependencies of
current-induced spin-orbit torques, especially the field-like (FL) component,
in various heavy metal (HM)/normal metal (NM) spacer/ferromagnet (FM)/Oxide
(MgO and HfOx/MgO) heterostructures. The FL torque in these samples originates
from spin current generated by the spin Hall effect (SHE) in the HM. For a FM
layer sufficiently thin that a substantial portion of this spin current can
reach the FM/Oxide interface, T-dependent spin scattering there can yield a
strong FL torque that is, in some cases, opposite in sign to that exerted at
the NM/FM interface.
