Asymmetric reversal modes in ferromagnetic/antiferromagnetic multilayers.

摘要: Experimentally an asymmetry of the reversal modes has been found in certain exchange bias systems. From a numerical investigation domain state model evidence is gained that this effect depends on angle between easy axis antiferromagnet and applied magnetic field. Depending ferromagnet reverses either symmetrically, e.g., by coherent rotation both sides loop, or asymmetric with nonuniform mode for ascending branch, which may even yield zero perpendicular magnetization.