- 专利标题: Magnetoresistive memory device and method of operating same using ferroelectric-controlled exchange coupling
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申请号: US17656306申请日: 2022-03-24
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公开(公告)号: US12106790B2公开(公告)日: 2024-10-01
- 发明人: Alan Kalitsov , Derek Stewart , Ananth Kaushik , Gerardo Bertero
- 申请人: SANDISK TECHNOLOGIES LLC
- 申请人地址: US TX Addison
- 专利权人: SANDISK TECHNOLOGIES LLC
- 当前专利权人: SANDISK TECHNOLOGIES LLC
- 当前专利权人地址: US TX Addison
- 代理机构: THE MARBURY LAW GROUP PLLC
- 主分类号: G11C11/16
- IPC分类号: G11C11/16 ; G01R33/09 ; H01F10/32 ; H10B61/00 ; H10N50/10 ; H10N50/80 ; H10N50/85
摘要:
A magnetoresistive memory cell includes a magnetoresistive layer stack containing a reference layer, a nonmagnetic spacer layer, and a free layer. A ferroelectric material layer having two stable ferroelectric states is coupled to a strain-modulated ferromagnetic layer to alter a sign of magnetic exchange coupling between the strain-modulated ferromagnetic layer and the free layer. The strain-modulated ferromagnetic layer may be the reference layer or a perpendicular magnetic anisotropy layer that is located proximate to the ferroelectric material layer. The magnetoresistive memory cell may be configured as a three-terminal device or as a two-terminal device, and may be configured as a tunneling magnetoresistance (TMR) device or as a giant magnetoresistance (GMR) device.
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