Patent ID: 8300356

Claim:
A spin transfer oscillator (STO) structure in a spintronic device, comprising: (a) a composite seed layer comprising at least a lower Ta layer formed on a substrate and a metal (M1) layer having a fcc( 111 ) or hcp( 001 ) crystal structure contacting the lower Ta layer; (b) a laminated spin injection layer (SIL) with high perpendicular magnetic anisotropy (PMA) and with a (A1/A2) x configuration contacting a top surface of the seed layer wherein x is in a range from 5 to 50, and a thickness (t 2 ) of each A2 magnetic layer is greater than a thickness (t 1 ) of each A1 magnetic layer, and at least one of the A1 and A2 magnetic layers is an alloy of Co or an alloy of Ni; (c) a non-magnetic spacer formed on the SIL; (d) a field generation layer (FGL) comprising a high Bs layer formed on the non-magnetic spacer; and (e) a capping layer contacting a top surface of the FGL.