Abstract
Magnetotransport properties of three-dimensional (3D) nano-sized structure with “small disk on a big disk” architecture are represented in this paper. We demonstrate an approach to analyze the spin configuration formed in the disks using magnetoresistance measurement. The behavior of magnetoresistance depends on the orientation of the applied magnetic field with respect to an axis connecting the centers of disks. This is explained by field dependent magnetic vortex nucleation and movement processes in the big disk. The experimental results are confirmed by the micromagnetic simulation of magnetoresistance loops.
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