Patent ID: 7355824
Filing Date: 2008-04-08
Classification: B82Y,G11C,H01F,H01L,Y10T

Abstract:
1. A magnetoresistive effect element comprising: a storage layer formed by stacking a plurality of ferromagnetic layers via non-magnetic layers; a magnetization fixed film having at least one ferromagnetic layer; and a tunnel barrier layer provided between the storage layer and the magnetization fixed film, wherein each of the ferromagnetic layers of the storage layer is formed of an Ni—Fe—Co ternary alloy which has a composition selected from one of a composition region surrounded by a straight line of Co a peak-to-peak maximum surface roughness on each of an interface between the storage layer and the tunnel barrier layer and an interface between the magnetization fixed film and the tunnel baffler layer is 0.4 nm or less, and the magnetization fixed film has one of a three layer structure wherein a ferromagnetic layer, an amorphous magnetic layer, and a ferromagnetic layer are sequentially stacked, and a laminated structure wherein a ferromagnetic layer, an amorphous magnetic layer, a ferromagnetic layer, a non-magnetic layer, an amorphous magnetic layer, and a ferromagnetic layer are sequentially stacked.