Magnetic antiparticles offer new horizons for information technologies

Johannes Gutenberg Universitaet Mainz

In the same way that spheres and doughnuts have different topologies, skyrmions possess a special property called topological charge which plays a similar role to electric charges when their dynamics are concerned. Simulation shows periodical evolution of skyrmion-antiskyrmions pairs Now physicists have shown that much richer phenomena can occur in nanometer-thick ferromagnets in which both skyrmions and antiskyrmions coexist. By using state-of-the-art simulation techniques to compute the magnetic properties and dynamics in such films, they studied how skyrmions and antiskyrmions respond when electric currents are applied to exert a force on them. By increasing the amount of energy transferred to the system from the applied currents, the researchers found that the trochoidal motion can evolve to skyrmion-antiskyrmions pairs being created periodically. In the nanoscale magnetic universe, at least, matter can arise naturally from a single antiparticle seed, Dupé said.

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