Patent ID: 7692902

Claim:
A tunnel magnetoresistance effect device comprising: a first antiferromagnetic material layer containing manganese; a first magnetization fixed layer of ferromagnetic material on the first antiferromagnetic material layer; a first inserted layer on the first magnetization fixed layer and comprising 1) MX, where M is an element selected from the group consisting of manganese, titanium, tantalum, vanadium, europium, and scandium, and X is an element selected from the group consisting of oxygen, nitrogen, and carbon or 2) an amorphous magnetic material; a second magnetization fixed layer of ferromagnetic material on the first inserted layer; a first tunnel barrier layer of dielectric material on the second magnetization fixed layer; a magnetization free layer of ferromagnetic material on the first tunnel barrier layer; and an antiferromagnetically coupling layer and a third magnetization fixed layer disposed between the second magnetization fixed layer and the first tunnel barrier layer, the third magnetization fixed layer antiferromagnetically coupling to the second magnetization fixed layer through the antiferromagnetically coupling layer.