  The effective field at the interface between ferromagnetic and metal layers
is often observed in spintronic experiments. It is common to ascribe it to
specific exchange interactions caused by spin-orbit coupling, namely, Rashba
field, Dzyaloshinskiy-Moriya interaction, spin currents, etc. Alternative view
involves the global magnetic field (Oersted field) generated by current both
inside and outside the conductor. It is shown here that the inhomogeneous stray
field surrounding ferromagnetic layers can produce significant contribution
into the observed interface field. This mechanism should be taken into account
for better understanding the current-induced phenomena in magnetic multilayers.
