Invention Grant
- Patent Title: Magnetic memory element and magnetic memory apparatus
- Patent Title (中): 磁存储元件和磁存储装置
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Application No.: US12379402Application Date: 2009-02-20
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Publication No.: US07889543B2Publication Date: 2011-02-15
- Inventor: Hirofumi Morise , Shiho Nakamura , Yuichi Ohsawa , Satoshi Yanagi , Daisuke Saida
- Applicant: Hirofumi Morise , Shiho Nakamura , Yuichi Ohsawa , Satoshi Yanagi , Daisuke Saida
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Nixon & Vanderhye PC
- Priority: JPP2008-039772 20080221
- Main IPC: G11C11/02
- IPC: G11C11/02

Abstract:
A magnetic memory element is provided with first and second ferromagnetic fixed layers, a ferromagnetic memory layer, nonmagnetic first and second intermediate layers. The memory layer is disposed between the first and second fixed layers, and has a variable magnetization direction. In order to cancel asymmetry of a write-in current of the element, the element is provided so that the memory layer receives a larger perpendicular stray field from the first fixed layer than from the second fixed layer, and then a magnetization direction of a portion of the memory layer being nearest to the first intermediate layer and the magnetization direction of the first fixed layer are antiparallel to each other whenever a magnetization direction of a portion of the memory layer being nearest to the second intermediate layer and the magnetization direction of the second fixed layer are parallel to each other, and vice versa.
Public/Granted literature
- US20090213638A1 Magnectic memory element and magnetic memory apparatus Public/Granted day:2009-08-27
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