发明申请
US20050174838A1 MRAM memory cell having a weak intrinsic anisotropic storage layer and method of producing the same
审中-公开
具有弱本征各向异性存储层的MRAM存储单元及其制造方法
- 专利标题: MRAM memory cell having a weak intrinsic anisotropic storage layer and method of producing the same
- 专利标题(中): 具有弱本征各向异性存储层的MRAM存储单元及其制造方法
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申请号: US11051471申请日: 2005-02-07
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公开(公告)号: US20050174838A1公开(公告)日: 2005-08-11
- 发明人: Manfred Ruehrig , Joachim Wecker
- 申请人: Manfred Ruehrig , Joachim Wecker
- 优先权: DE102004005921.7 20040206
- 主分类号: G11C11/02
- IPC分类号: G11C11/02 ; G11C11/14 ; G11C11/16 ; G11C11/34 ; G11C13/06 ; H01L27/22
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.
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