Constrained Domain Walls: Magnetism and Transport
Magnetic domain walls in constrained geometries might be much narrower than domain walls one can find in bulk materials. Two important consequences follow from this observation. First, this leads to greater domain wall resistance because electrons traveling across the constrained domain wall are scattered more efficiently by the abruptly changing spin structure. Second, in geometries where the domain wall width is reduced down to a few interatomic distances the sharp variation in the spin structure affects the magnitude of magnetic moments of atoms forming the domain wall. These phenomena are to be studied using micromagnetic modeling and first-principles calculations of the electronic structure in projects: Resistance of a constrained domain wall Domain wall magnetoresistance in Co nanowires Magnetic moment softening by domain walls in Ni nanowires |