Patent ID: 8274811
Filing Date: 2012-09-25
Classification: B82Y,G11B,G11C,H01F,H01L,H03B,Y10T

Abstract:
1. A spin transfer oscillator (STO) structure, comprising: (a) a seed layer formed on a substrate; (b) a spin injection layer (SIL) having perpendicular magnetic anisotropy (PMA); (c) a composite field generation layer (FGL) having a synthetic anti-ferromagnetic (SyAF) configuration wherein a first FGL layer with a first thickness and a second FGL layer with a second thickness that is less than the first thickness have magnetic moments in opposite in-plane directions and are separated by a coupling layer; (d) a first PMA assist layer that adjoins the first FGL layer and is separated from the SIL by a first spacer; and (e) a second PMA assist layer that is separated from the second FGL by a second spacer, and wherein all of the aforementioned layers including the seed layer, SIL, composite FGL, first and second PMA assist layers, and first and second spacers are formed in a stack on the substrate.