The Effect of Interface Inhomogeneity on an Exchange Bias Field in a Ferromagnet/Antiferromagnet Bilayer System

The effect of interface inhomogeneity on the exchange bias field value in the ferromagnet/antiferromagnet bilayer system is investigated by computer simulation. The case of a thin ferromagnetic film on a thick antiferromagnetic substrate is studied. The Ising model and Metropolis algorithm are used for research. The inhomogeneity of the substrate surface is modeled as random point nonmagnetic impurities. The exchange bias field is determined by the hysteresis loop offset. The dependence of the exchange bias field on the concentration of impurities on the substrate surface at different temperatures is calculated.