Invention Grant
- Patent Title: Multilayers having reduced perpendicular demagnetizing field using moment dilution for spintronic applications
- Patent Title (中): 具有减少的垂直退磁场的多层使用瞬时应用的时间稀释
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Application No.: US14047130Application Date: 2013-10-07
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Publication No.: US09048411B2Publication Date: 2015-06-02
- Inventor: Guenole Jan , Ru Ying Tong , Witold Kula
- Applicant: Guenole Jan , Ru Ying Tong , Witold Kula
- Applicant Address: US CA Milpitas
- Assignee: Headway Technologies, Inc.
- Current Assignee: Headway Technologies, Inc.
- Current Assignee Address: US CA Milpitas
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman
- Main IPC: H01L29/82
- IPC: H01L29/82 ; H01L43/02 ; H01L43/08 ; H01L43/10 ; H01L43/12 ; G11C11/16
Abstract:
A magnetic element is disclosed that has a composite free layer with a FM1/moment diluting/FM2 configuration wherein FM1 and FM2 are magnetic layers made of one or more of Co, Fe, Ni, and B and the moment diluting layer is used to reduce the perpendicular demagnetizing field. As a result, lower resistance x area product and higher thermal stability are realized when perpendicular surface anisotropy dominates shape anisotropy to give a magnetization perpendicular to the planes of the FM1, FM2 layers. The moment diluting layer may be a non-magnetic metal like Ta or a CoFe alloy with a doped non-magnetic metal. A perpendicular Hk enhancing layer interfaces with the FM2 layer and may be an oxide to increase the perpendicular anisotropy field in the FM2 layer. A method for forming the magnetic element is also provided.
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