Patent ID: 7038894

Claim:
A magnetic memory device comprising: a memory cell comprising a ferromagnetic double tunnel junction having a stacked structure of a first ferromagnetic layer, a first tunnel insulator, a second ferromagnetic layer, a first nonmagnetic layer, a third ferromagnetic layer, a second nonmagnetic layer, a stack of a soft magnetic layer and a fourth ferromagnetic layer, a second tunnel insulator, and a fifth ferromagnetic layer, which are stacked in the order recited, the second and third ferromagnetic layers being antiferromagnetically coupled through a first nonmagnetic layer, the third ferromagnetic layer and the stack of the soft magnetic layer and the fourth ferromagnetic layer being antiferromagnetically coupled through a second nonmagnetic layer, magnetization of the first ferromagnetic layer and magnetization of the fifth ferromagnetic layer being pinned in the same direction, and a magnetization direction of the second and the fourth ferromagnetic layers and a magnetization direction of the first and the fifth ferromagnetic layers being substantially parallel or anti-parallel to each other when no current magnetic field is applied; a bit line extending to a first direction; and a word line extending to a second direction crossing the first direction.