A magnetic tunnel junction cell that has a ferromagnetic pinned layer, a
ferromagnetic free layer, and a non-magnetic barrier layer therebetween.
The free layer has a larger area than the pinned layer, in some
embodiments at least twice the size of the pinned layer, in some
embodiments at least three times the size of the pinned layer, and in yet
other embodiments at least four times the size of the pinned layer. The
pinned layer is offset from the center of the free layer. The free layer
has a changeable vortex magnetization, changeable between clockwise and
counterclockwise directions.