Magnetic phase diagram of a ferromagnet-antiferromagnet-ferromagnet spin-valve structure with rough interfaces

The thickness-roughness phase diagram of a ferromagnet-antiferromagnet-ferromagnet spinvalve system is studied in the case where the roughness of the interfaces between the layers causes frustration of the exchange interaction between them. It is shown that the inclusion of easy-axis single-ion anisotropy makes the phase diagram significantly more complicated in comparison with that calculated within the exchange approximation. A new type of domain walls (three-layered domain walls) is predicted to arise due to frustrations. It is shown that domain walls in the antiferromagnetic interlayer are switched when the parallel orientation of the magnetization vectors of the ferromagnetic layers changes to the antiparallel one.