Patent ID: 8686484

Claim:
A spin-torque magnetoresistive memory element formed on a substrate having a surface defining a plane, the spin-torque magnetoresistive memory element comprising: a first electrode comprising a ferromagnetic material formed over the substrate; a second electrode; a free magnetic layer comprising a ferromagnetic material and not a anti-ferromagnetic material; a first tunnel barrier positioned between the free magnetic layer and the first electrode to form a first tunnel junction having a first magnetoresistance ratio and a first resistance-area product; and a second tunnel barrier positioned between the free magnetic layer and the second electrode to form a second tunnel junction having a second magnetoresistance ratio and a second resistance-area product, wherein the first magnetoresistance ratio and the first resistance-area product are one of less than half or more than double the second magnetoresistance ratio and the second resistance-area product, respectively.