MRAM memory cell having a weak intrinsic anisotropic storage layer and method of producing the same

摘要

An MRAM memory cell has a layer system of circular-disk-shaped layers. The memory cell includes two magnetic layers separated by a nonmagnetic intermediate layer. The first magnetic layer or reference layer exhibits hard-magnetic behavior. The second magnetic layer or storage layer exhibits soft-magnetic behavior. Information is stored by the magnetization state of the storage layer. The storage layer has a weak intrinsic anisotropy that defines a magnetic preferred direction. The magnetization direction of the reference layer is parallel to the magnetization direction of a remnant magnetization in the interior of the storage layer. The remnant magnetization occurs as a result of applying an external magnetic field with a field component perpendicular to the preferred direction of the intrinsic anisotropy of the storage layer.