  We report systematic measurements of anomalous Hall effect(AHE) and spin
orbit torques(SOT) in MnGa/IrMn films,, in which a single MnGa epitaxial layer
reveals obvious orbital two-channel Kondo (2CK) effect. As increasing the
thickness of the antiferromagnet IrMn, the strong spin Hall effect(SHE)has
gradually suppressed the orbital 2CK effect and modified the AHE of MnGa.A
scaling involving multiple competing scattering mechanisms has been used to
distinguish different contributions to the modified AHE. Finally, the sizeable
SOT in the MnGa/IrMn films induced by the strong SHE of IrMn have been
investigated.The IrMn layer also supplies an in-plane exchange bias field and
enables nearly field-free magnetization reversal.
