Abstract
We report on novel method of manipulation of the micromagnetic configuration realized in 3-D nanostructures “small disk on the big disk”. Our method allows to control vortex chirality in a submicrometer magnetic disk without use of its deformation or defects of shape. Manipulation is performed by means of the fabrication on the top of disk a smaller disk with a diameter 200 nm. This paper shows that it is possible to explicitly set the magnetization direction of the small disk. Thus, the proposed system has four stable magnetic configurations that are uniquely specified by the direction of an external magnetic field.
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