Patent ID: 7196882

Claim:
A magnetic tunnel junction device comprising: a first conductor; a first pinned ferromagnetic layer having a first magnetic orientation in a first direction formed over said first conductor; a second pinned ferromagnetic layer having a second magnetic orientation in a second direction, said second direction being substantially opposite to said first direction; a sense layer positioned between said first pinned ferromagnetic layer and said second pinned ferromagnetic layer, wherein said sense layer further comprises first and second free ferromagnetic layers separated by a conductive layer, and wherein the conductive layer produces an antiferromagnetic coupling between the first and second free ferromagnetic layers, said first and second free ferromagnetic layers having a net moment that does not cancel one another; a first tunnel barrier layer positioned between said first pinned ferromagnetic layer and said sense layer; a second tunnel barrier layer positioned between said second pinned ferromagnetic layer and said sense layer; and a second conductor formed on said second pinned ferromagnetic layer.