Patent ID: 6987653

Claim:
A magnetic memory device comprising: a memory cell comprising a ferromagnetic double tunnel junction having a stacked structure of a first ferromagnetic layer comprising two ferromagnetic films antiferromagnetically coupled through a non-magnetic film, a first tunnel insulator, a second ferromagnetic layer, a first nonmagnetic layer, a third ferromagnetic layer, a second nonmagnetic layer, a fourth ferromagnetic layer, a second tunnel insulator, and a fifth ferromagnetic layer comprising two ferromagnetic films antiferromagnetically coupled through a non-magnetic film, which are stacked in the order recited, the second and third ferromagnetic layers being antiferromagnetically coupled through a first nonmagnetic layer, the third and fourth ferromagnetic layers being antiferromagnetically coupled through a second nonmagnetic layer, magnetization of the ferromagnetic film of the first ferromagnetic layer in a region in contact with the first tunnel insulator and magnetization of the ferromagnetic film of the fifth ferromagnetic layer in a region in contact with the second tunnel insulator 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.