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Multistable switching due to magnetic vortices pinned at artificial pinning sites

Rahm, M. ; Stahl, Joachim ; Wegscheider, Werner ; Weiss, Dieter


Magnetic vortices form the ground state in micron and submicron ferromagnetic disks. By inserting artificial defects (antidots) into a submicron ferromagnetic disk, magnetic vortices can be pinned controllably thus enabling a different way for magnetic switching. We show that by inserting n antidots into a disk magnetization reversal takes place via n-1 jumps of the vortex core between ...


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