Invention Grant
- Patent Title: Magnetic junctions using asymmetric free layers and suitable for use in spin transfer torque memories
- Patent Title (中): 使用不对称自由层并适用于自旋转移转矩存储器的磁结
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Application No.: US14558145Application Date: 2014-12-02
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Publication No.: US09184375B1Publication Date: 2015-11-10
- Inventor: Xueti Tang , Jangeun Lee
- Applicant: Samsung Electronics Co., LTD.
- Applicant Address: KR Gyeonggi-Do
- Assignee: SAMSUNG ELECTRONICS CO., LTD.
- Current Assignee: SAMSUNG ELECTRONICS CO., LTD.
- Current Assignee Address: KR Gyeonggi-Do
- Agency: Covergent Law Group LLP
- Main IPC: H01L29/82
- IPC: H01L29/82 ; H01L43/02 ; H01L43/08 ; H01L27/22 ; H01L43/12

Abstract:
A magnetic junction usable in a magnetic device is described. The magnetic junction includes a pinned layer, a nonmagnetic spacer layer, an asymmetric free layer and a perpendicular magnetic anisotropy (PMA) inducing layer. The nonmagnetic spacer layer is between the pinned layer and the free layer. The free layer is between the nonmagnetic spacer layer and the PMA inducing layer. The asymmetric free layer includes a first ferromagnetic layer having a first boron content and a second ferromagnetic layer having a second boron content. The second boron content is less than the first boron content. The first boron content and the second boron content are each greater than zero atomic percent. The magnetic junction is configured such that the asymmetric free layer is switchable between stable magnetic states when a write current is passed through the magnetic junction.
Information query
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