Patent ID: 7750421

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 laminate further comprising at least one interfacial layer of crystalline ferromagnetic material and an amorphous ferromagnetic layer formed thereon 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 by means of a torque exerted on said magnetization by the electron spins characterizing said current.