发明授权
US07583481B2 FCC-like trilayer AP2 structure for CPP GMR EM improvement
有权
FCC类三层AP2结构，用于CPP GMR EM改进
- 专利标题： FCC-like trilayer AP2 structure for CPP GMR EM improvement
- 专利标题（中）： FCC类三层AP2结构，用于CPP GMR EM改进
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申请号： US11234719申请日： 2005-09-23
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公开(公告)号： US07583481B2公开(公告)日： 2009-09-01
- 发明人: Kunliang Zhang , Dan Abels , Min Li , Chyu-Jiuh Torng , Chen-Jung Chien , Yu-Hsia Chen
- 申请人： Kunliang Zhang , Dan Abels , Min Li , Chyu-Jiuh Torng , Chen-Jung Chien , Yu-Hsia Chen
- 申请人地址： US CA Milpitas
- 专利权人： Headway Technologies, Inc.
- 当前专利权人： Headway Technologies, Inc.
- 当前专利权人地址： US CA Milpitas
- 代理机构： Saile Ackerman LLC
- 代理商 Stephen B. Ackerman
- 主分类号： G11B5/33
- IPC分类号： G11B5/33 ; G11B5/127
摘要：
A CPP-GMR spin valve having a pinned layer with an AP2/coupling/AP1 configuration is disclosed wherein the AP2 portion is a FCC-like trilayer having a composition represented by CoZFe(100-Z)/Fe(100-X)TaX/CoZFe(100-Z) or CoZFe(100-Z)/FeYCo(100-Y)/CoZFe(100-Z) where x is 3 to 30 atomic %, y is 40 to 100 atomic %, and z is 75 to 100 atomic %. Preferably, z is 90 to provide a face centered cubic structure that minimizes electromigration. Optionally, the middle layer is comprised of an Fe rich alloy such as FeCr, FeV, FeW, FeZr, FeNb, FeHf, or FeMo. EM performance is improved significantly compared to a spin valve with a conventional AP2 Co50Fe5 or Co75Fe25 single layer. The MR ratio of the spin valve is also increased and the RA is maintained at an acceptable level. The coupling layer is preferably Ru and the AP1 layer may be comprised of a lamination of CoFe and Cu layers as in [CoFe/Cu]2/CoFe.