Direct observation of spin configuration and classificatio of switching processes in mesoscopic ferromagnetic rings
نویسندگان
چکیده
Using nonintrusive imaging techniques we have directly observed the nanoscopic details of the magnetization configuration of epitaxial and polycrystalline mesoscopic ring structures with a ,15-nm resolution. We have found head to head domain walls with different spin structures depending on ring width. Further, we can classify the geometry dependent switching processes according to the number of transitions ~single, double, triple! that a ring undergoes in a hysteresis cycle. In the case of triple switching we fin a state with a complete vortex core present in the ring.
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