Patent ID: 9048411
Filing Date: 2015-06-02
Classification: G11C,H01L

Abstract:
1. A magnetic tunnel junction with a top spin valve configuration, comprising: (a) a seed layer formed on a substrate; (b) a perpendicular Hk enhancing layer formed on the seed layer, the perpendicular Hk enhancing layer is a metal oxide; (c) a composite free layer having a FM2/moment diluting layer/FM1 configuration wherein the first ferromagnetic (FM1) layer has an interface with a bottom surface of a tunnel barrier layer and the second ferromagnetic (FM2) layer has an interface with a top surface of the perpendicular Hk enhancing layer, the interfaces produce interfacial perpendicular anisotropy in the adjoining FM1 and FM2 layers, respectively, such that the interfacial perpendicular anisotropy dominates a shape anisotropy field and thereby establishes perpendicular magnetic anisotropy within the FM1 and FM2 layers; (d) the tunnel barrier; (e) a pinned layer formed on the tunnel barrier layer; and (f) a capping layer as the uppermost layer in the top spin valve configuration.