Tailoring domain walls in NiFe nanorings, in dipolar coupled cylindrical core-shell structures
Tailoring domain walls in NiFe nanorings, in dipolar coupled cylindrical core-shell structures
Nanostructured magnetic systems have been the focus of intense research effort in recent years. From the pure theoretical point of view, the interest focus on new magnetic phases that might emerge from dipolar effects in systems, with geometric constrictions, with dimensions of the order of fundamental magnetic lengths. There is also a large interest from the viewpoint of applications, such as magnetic sensors, nano-oscillators and new designs of magnetic memories. Motivated by recent experimental results, showing the possibility of domain wall confinement in ferromagnetic nanorings, by magnetic constrictions like notches and asymmetries, in addition to studies which reveal a strong