Patent ID: 9478729
Filing Date: 2016-10-25
CPC Classification: G11C,H01L

Claim Text:
1. A magnetic memory device comprising: a first fixed magnetic layer; a first free magnetic layer; a second free magnetic layer; a second fixed magnetic layer; a first non-magnetic layer disposed between the first fixed magnetic layer and the first free magnetic layer; a second non-magnetic layer disposed between the first free magnetic layer and the second free magnetic layer; and a third non-magnetic layer between the second free magnetic layer and the second fixed magnetic layer, wherein the first fixed magnetic layer is a thin layer formed of a material that has a fixed magnetization direction and that is magnetized in a perpendicular direction to a plane of the first fixed magnetic layer, wherein the first free magnetic layer is a thin layer formed of a material that has a magnetization direction which can be changed by an applied current and that is magnetized in a perpendicular direction to a plane of the first free magnetic layer, wherein the second free magnetic layer is a thin layer formed of a material that has a magnetization direction which can be changed by an applied current and that is magnetized in a horizontal direction to a plane of the second free magnetic layer, wherein the second fixed magnetic layer is a thin layer formed of a material that has a fixed magnetization direction opposite to the first fixed magnetic layer and that is magnetized in a perpendicular direction to a plane of the second fixed magnetic layer, and wherein a saturation magnetization value of the material magnetized in the horizontal direction is in a range of 300-2000 kA/m.