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Topological spin textures can serve as non-volatile information carriers. Here we study the current-induced dynamics of magnetic skyrmions on a nanoscale square grid formed by orthogonal defect lines with reduced magnetic anisotropy. A skyrmion on the square grid is pixelated with a quantized size of the grid. We demonstrate that the position, size, and shape of skyrmions on the square grid are electrically configurable, which can be used to store digital information. The skyrmion center is quantized to be on the grid and the skyrmion shows a hopping motion instead of a continuous motion. We find that the skyrmion Hall effect can be perfectly prohibited due to the pinning effect of the grid. The pixelated skyrmions can be harnessed to build the programmable racetrack memory, multistate memory, and logic computing device. Our results will be a basis for future digital computation based on pixelated topological spin textures.
It is well established that the spin-orbit interaction in heavy metal/ferromagnet heterostructures leads to a significant interfacial Dzyaloshinskii-Moriya Interaction (DMI) that modifies the internal structure of magnetic domain walls (DWs) to favor
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Non-collinear magnets exhibit a rich array of dynamic properties at microwave frequencies. They can host nanometre-scale topological textures known as skyrmions, whose spin resonances are expected to be highly sensitive to their local magnetic enviro
We address the issue of inter-particle dipolar interactions in the context of magnetic hyperthermia. More precisely, the main question dealt with here is concerned with the conditions under which the specific absorption rate is enhanced or reduced by