Patent ID: 6838740

Claim:
A magnetic element comprising: a first pinned layer, the first pinned layer being ferromagnetic and having a first magnetization pinned in a first direction a first nonmagnetic layer, the first nonmagnetic layer being conductive and including a first diffusion barrier; a second pinned layer, the second pinned layer being ferromagnetic and having a second magnetization pinned in a second direction, the first nonmagnetic layer being between the first pinned layer and the second pinned layer, the second pinned layer being antiferromagnetically coupled with the first pinned layer; a second nonmagnetic layer, the second nonmagnetic layer being conductive and including a second diffusion barrier; a third pinned layer, the third pinned layer being ferromagnetic and having a third magnetization pinned in a third direction, the second nonmagnetic layer being between the third pinned layer and the second pinned layer, the third pinned layer being antiferromagnetically coupled with the second pinned layer; a free layer, the free layer being ferromagnetic and having a free layer magnetization; and a nonmagnetic spacer layer, the nonmagnetic spacer layer being conductive, the nonmagnetic spacer layer being between the free layer and the third pinned layer.