Patent ID: 7859034

Claim:
A device, comprising: a substrate; and a magnetic cell formed on the substrate and comprising: a free ferromagnetic layer having a net magnetization direction that is changeable between a first direction and a second substantially opposite direction; a magnetic biasing layer in contact with and magnetically coupled to the free ferromagnetic layer to increase coercivity of the free ferromagnetic layer and to allow the magnetization direction of the free ferromagnetic layer to be changeable between the first direction and the second substantially opposite direction, the magnetic biasing layer comprising (1) an oxide antiferromagnetic layer adjacent to or in contact with the free ferromagnetic layer to reduce a spin transfer torque switching current for switching the magnetization of the free ferromagnetic layer and to allow for tunneling of electrons through the oxide antiferromagnetic layer and (2) a metallic antiferromagnetic layer; a fixed ferromagnetic layer having a fixed magnetization direction; and a center layer formed between the free ferromagnetic layer and the fixed ferromagnetic layer.