发明申请
- 专利标题: MAGNETIC RANDOM ACCESS MEMORY
- 专利标题(中): 磁性随机存取存储器
-
申请号: US12865194申请日: 2009-01-09
-
公开(公告)号: US20100309712A1公开(公告)日: 2010-12-09
- 发明人: Shunsuke Fukami , Nobuyuki Ishiwata , Tetsuhiro Suzuki , Norikazu Ohshima , Kiyokazu Nagahara
- 申请人: Shunsuke Fukami , Nobuyuki Ishiwata , Tetsuhiro Suzuki , Norikazu Ohshima , Kiyokazu Nagahara
- 优先权: JP2008-038066 20080219
- 国际申请: PCT/JP2009/050210 WO 20090109
- 主分类号: G11C11/00
- IPC分类号: G11C11/00
摘要:
An MRAM has: a memory cell including a first magnetoresistance element; and a reference cell including a second magnetoresistance element. The first magnetoresistance element has a first magnetization free layer, a first magnetization fixed layer, a second magnetization free layer and a first nonmagnetic layer sandwiched between the first magnetization fixed layer and the second magnetization free layer. The first magnetization free layer has perpendicular magnetic anisotropy, and the first magnetization fixed layer and the second magnetization free layer has in-plane magnetic anisotropy. The first magnetization free layer has: first and second magnetization fixed regions whose magnetization directions are fixed; and a magnetization free region whose magnetization direction is reversible and connected to the first and second magnetization fixed regions. The magnetization free region and the second magnetization free layer are magnetically coupled to each other. In a plane parallel to each layer, center of the second magnetization free layer is displaced in a first direction from center of the magnetization free region. Whereas, the second magnetoresistance element has: a third magnetization free layer whose magnetization easy axis is parallel to a second direction; a second magnetization fixed layer whose magnetization direction is fixed in a third direction perpendicular to the second direction; and a second nonmagnetic layer sandwiched between the second magnetization fixed layer and the third magnetization free layer. The second magnetization fixed layer and the third magnetization free layer have in-plane magnetic anisotropy.
公开/授权文献
- US08149615B2 Magnetic random access memory 公开/授权日:2012-04-03
信息查询