Phase diagram of imperfect ferromagnetic/antiferromagnetic bilayers

The phase diagram for ferromagnetic/antiferromagnetic bilayers with imperfect interfaces is calculated, using an Ising spin-1/2 model which is solved numerically in the mean field approximation for finite temperatures. We identify three stable phases: (i) domains in the ferromagnet, (ii) domains in the antiferromagnet and (iii) domain wails near the interfaces with homogeneous order within the layers. Phase transitions between these phases occur as a function of temperature, relative film thicknesses and step density.