Patent ID: 8058698

Claim:
An STT-MTJ MRAM cell operating in a CPP configuration and utilizing the transfer, by torque, of conduction electron spin angular momentum to change a free layer magnetization direction, comprising: a substrate; an MTJ element formed on said substrate, said MTJ element comprising a vertically stacked lamination of horizontal parallel layers including, therein, in the following order: an antiferromagnetic pinning layer formed of MnIr, an SyAP pinned layer processed by a plasma process to have a smooth/flat interfacial surface, a tunneling barrier layer formed on said smooth/flat interfacial surface, said tunneling barrier layer having a crystalline structure and comprising a naturally oxidized, sputtered layer of Mg, a ferromagnetic free layer formed on said tunneling barrier layer, said ferromagnetic free layer having a low magnetic damping factor and producing enhanced polarization of conduction electrons, and a capping layer formed on said ferromagnetic free layer, and wherein said ferromagnetic free layer is a bilayer comprising a crystalline layer of a binary alloy of Fe rich FeCo on which is formed a crystalline layer of a binary alloy of Fe rich FeNi and whereby a current of conduction electrons in the vertical direction can change the direction of magnetization of said ferromagnetic free layer relative to the magnetization direction of said SyAP pinned layer.