Distortions of magnetic order parameters due to “charged” edges of atomic steps at the ferromagnet–antiferromagnet interface

Distortions of the magnetic order parameters due to the presence of uncompensated antiferromagnetic spins near the edges of atomic steps at the interface between the ferromagnetic film and the antiferromagnetic substrate with compensated atomic planes parallel to the interface have been studied. It has been demonstrated that such “charged” linear defects do not give rise to domains in the film or substrate, as was suggested in some models of the exchange bias. The cases of large and small strengths of random fields arising due to the presence of uncompensated spins near the step edges have been investigated.