Patent ID: 8871365

Claim:
A multilayer stack having a thermal stability to at least 400° C. in a magnetic device, comprising: (a) a seed layer formed on a substrate; (b) a first reference (RL1) layer and a second reference (RL2) layer each exhibiting perpendicular magnetic anisotropy; (c) a spacer that induces RKKY (antiferromagnetic) coupling between the RL1 and RL2 layers; (d) a first dusting layer (DL1) and a second dusting layer (DL2) that enhance the RKKY coupling between the RL1 and RL2 layers; and (e) a transitional layer made of CoFeB/Co as the uppermost layer in the multilayer stack, the CoFeB layer contacts the RL2 layer to give a seed layer/RL1/DL1/spacer/DL2/RL2/CoFeB/Co configuration.