  Here, we show that the ferro(para)magnetic and non-collinear
antiferromagnetic interfaces contribute to oscillating signals observed in the
magnetoresistance. We associate the effect with the fact that the spins on the
surface of IrMn3 produce instability in the surface magnetoresistance of the
material, which is sensitive to the magnetic field. We carried out experiments
using bilayers of IrMn3 under permalloy (Py) and IrMn3 under platinum (Pt). The
oscillations were intensely evident at the Py/IrMn3 interface and less explicit
at the Pt/IrMn3 interface. We carried out the experiments using pulsed current,
with a square pulse width of 1{\mu}s and amplitudes of 20 {\mu}A to 20 mA. The
oscillating signals are proportional to the crystallographic direction of the
material, the ferromagnetism of the material adjacent to IrMn3, and sensitive
to the amplitude of the pulsed current. We believe that observation is a way of
transmitting encoded information through magnetoresistance.
