Abstract
In multilayers with weak perpendicular magnetic anisotropy, nucleation of magnetic vortex-antivortex pairs at the surfaces is set by topological characteristics, yielding a robust means to control vortex motion in extended films. However, exploiting this effect in digital memory devices would require a suitably broad range of fields supporting guided vortex motion. X-ray microscopy reveals cycloidal domains at the top surface with a stability range of tens of mT, in which propagation of magnetic vortices is effectively guided by the pattern of parallel stripes. This finding is an essential step toward the possible application of moving magnetic vortices in unpatterned films.
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