Abstract
Antiferromagnetically coupled multilayers with perpendicular anisotropy, such as [CoPt]∕Ru, Co∕Ir, and Fe∕Au, display ferromagnetic stripe phases as the ground states. It is theoretically shown that the antiferromagnetic interlayer exchange causes a relative shift of domains in adjacent layers. This “exchange shift” is responsible for several recently observed effects: an anomalous broadening of domain walls, the formation of the so-called “tiger-tail” patterns, and a “mixed state” of antiferromagnetic and ferromagnetic domains in [CoPt]∕Ru multilayers. The derived analytical relations between the values of the shift and the strength of antiferromagnetic coupling provide an effective method for a quantitative determination of the interlayer exchange interactions.
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