Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3597297
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- BMBF [05 KS4WE1/6, FKZ 13N10144]
- EU [226716]
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We report on the coupling of spin vortices in magnetic multilayer elements. The magnetization distribution in thin film disks consisting of two ferromagnetic layers separated by a nonmagnetic spacer is imaged layer-resolved by using x-ray microscopy. We directly observe two fundamentally different vortex coupling states, namely antiferromagnetic and ferromagnetic orientation of the flux directions. It is found that these states are predetermined for systems that involve a sufficiently strong interlayer exchange coupling, whereas for the case of a purely dipolar interaction both states are transformable into each other. (C) 2011 American Institute of Physics. [doi:10.1063/1.3597297]
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