Patent ID: 8513752
Filing Date: 2013-08-20
Classification: B82Y,H01F,H01L

Abstract:
1. A magnetic tunnel junction comprising: an ferromagnetic reference layer having a first reference layer side and an opposing second reference layer side, the first reference layer side having a greater concentration of boron than the second reference layer side, and the second reference side comprising a reference layer crystal structure and the ferromagnetic reference layer has a boron concentration gradient extending between the first reference layer side and the opposing second reference layer side; an oxide tunnel barrier layer disposed on the second side of the ferromagnetic reference layer, the oxide tunnel barrier layer having a crystal structure; and an amorphous ferromagnetic free layer in contact with the oxide tunnel barrier layer wherein the amorphous ferromagnetic reference layer comprises a first sub-layer having a first boron concentration and a second sub-layer having a second boron concentration, and the first boron concentration is greater than the second boron concentration.