Invention Grant
- Patent Title: Exchange-assisted spin transfer torque switching
- Patent Title (中): 交流辅助自旋转矩转换
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Application No.: US12541111Application Date: 2009-08-13
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Publication No.: US08134864B2Publication Date: 2012-03-13
- Inventor: Randall H. Victora , Xi Chen
- Applicant: Randall H. Victora , Xi Chen
- Applicant Address: US MN St. Paul
- Assignee: Regents of the University of Minnesota
- Current Assignee: Regents of the University of Minnesota
- Current Assignee Address: US MN St. Paul
- Agency: Shumaker & Sieffert, P.A.
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
In general, the invention is directed to techniques for reducing the amount of switching current that is utilized within a magnetic storage (e.g., MRAM) device. An example apparatus includes a fixed magnetic layer that provides a fixed direction of magnetization, an exchange-coupled magnetic multi-layer structure, and a non-magnetic layer placed between the fixed magnetic layer and the exchange-coupled magnetic multi-layer structure. The exchange-coupled magnetic multi-layer structure includes a recording layer configured to record information and an assisting layer having a lower anisotropy than the recording layer. The exchange coupling between the recording and assisting layers is operable to switch a magnetization direction of the recording layer. In some cases, the exchange-coupled magnetic multi-layer structure may further include a spacer separating the recording and assisting layers and configured to weaken an exchange coupling between the recording and assisting layers.
Public/Granted literature
- US20100039855A1 EXCHANGE-ASSISTED SPIN TRANSFER TORQUE SWITCHING Public/Granted day:2010-02-18
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