Patent ID: 7501688

Claim:
A spin injection magnetization reversal element comprising, in order, a ferromagnetic fixed layer, an isolation layer and a ferromagnetic free layer, in which element flow of a current between the ferromagnetic fixed layer and the ferromagnetic free layer causes transition between a state in which the direction of the magnetization of the ferromagnetic fixed layer and the direction of the magnetization of the ferromagnetic free layer are in parallel with each other and a state in which the directions of the magnetization are in antiparallel with each other, wherein the ferromagnetic fixed layer surrounds the ferromagnetic free layer, wherein a free layer electrode is electrically connected to the ferromagnetic free layer apart from the ferromagnetic fixed layer and a fixed layer electrode is electrically connected to the ferromagnetic fixed layer apart from the ferromagnetic free layer, and wherein an area with which the ferromagnetic fixed layer is in contact with the isolation layer is larger than an area with which the ferromagnetic free layer is in contact with the isolation layer.