Patent ID: 8508004

Claim:
A memory device comprising: a fixed magnetic layer; a tunnel barrier layer over the fixed magnetic layer; and a free magnetic structure formed over the tunnel barrier layer, wherein the free magnetic structure comprises: a first free magnetic layer; a second free magnetic layer; a first interlayer positioned between the first and second free magnetic layers and having a thickness of less than 1.5 nanometers, wherein the second free magnetic layer is weakly magnetically coupled at less than 1000 Oe to the first free magnetic layer; a third free magnetic layer; and a second interlayer positioned between the second and third free magnetic layers and having a thickness of less than 1.5 nanometers, wherein the third free magnetic layer is weakly magnetically coupled at less than 1000 Oe to the second free magnetic layer and wherein: the memory device is capable of being programmed by impinging a spin-polarized electron current on the free magnetic structure.