Patent ID: 8421171
Filing Date: 2013-04-16
Classification: G11C,H01L

Abstract:
1. A magnetic random access memory, having a perpendicular magnetization direction, comprising: a pinned layer, comprising a first magnetic layer and a first polarization enhancement layer, and having a first magnetization direction and a first perpendicular magnetic anisotropy; a free layer, comprising a second magnetic layer and a second polarization enhancement layer, and having a second magnetization direction and a second perpendicular magnetic anisotropy; a barrier layer, formed between the pinned layer and the free layer, wherein the first polarization enhancement layer is disposed between the first magnetic layer and the barrier layer, the second polarization enhancement layer is disposed between the second magnetic layer and the barrier layer, and the barrier layer is disposed between the first polarization enhancement layer and the second polarization enhancement layer; a spacer, formed on the free layer; and a free assisting layer, disposed on the spacer, and having an in-plane magnetic anisotropy, and having a magnetization direction capable of being freely varied, wherein the spacer and the barrier layer are disposed on opposite sides of the free layer.