Investigation of the dynamics of magnetic Vortices in trilayer systems

Magnetic Vortices are of great interest for storage media for quite a while. Different control methods are used to manipulate them. We now use scanning transmission x-ray microscopy (STXM) to image the magnetic configurations within the different layer of a trilayer system of Cobalt/Copper/Permalloy. The dominant coupling mechanisms here are the magneto-dipolar interaction and interlayer exchange coupling. The corresponding behaviors of the magnetization configurations in a static magnetic field, as well as in an oscillating magnetic field, are investigated. The emerging movement of the core can be tuned with the amplitude and frequency of the field. The interactions of the two cores and their individually resonance frequencies are studied. This implies the corresponding resistance changes within different configurations at different magnetic fields and currents as well as the shifting of the core.