发明名称 |
CPP structure with enhanced GMR ratio |
摘要 |
A CPP-GMR spin valve having a CoFe/NiFe composite free layer is disclosed in which Fe content of the CoFe layer ranges from 20 to 70 atomic % and Ni content in the NiFe layer varies from 85 to 100 atomic % to maintain low Hc and λS values. A higher than normal Fe content in the CoFe layer improves the MR ratio by ≧16% compared with conventional CoFe/NiFe free layers in which the Fe content in CoFe is typically <20 atomic % and the Ni content in NiFe is <85 atomic %. The CPP-GMR performance may also be optimized by incorporating a confining current path layer in the copper spacer between the pinned layer and free layer. For a pinned layer with an AP2/Ru/AP1 configuration, the spin valve performance is further improved by an AP1 layer comprised of a lamination of CoFe and Cu layers as in [CoFe/Cu]2/CoFe. |
申请公布号 |
US8289661(B2) |
申请公布日期 |
2012.10.16 |
申请号 |
US201113065975 |
申请日期 |
2011.04.04 |
申请人 |
ZHANG KUNLIANG;LI MIN;CHEN YU-HSIA;TORNG CHYU-JIUH;HEADWAY TECHNOLOGIES, INC. |
发明人 |
ZHANG KUNLIANG;LI MIN;CHEN YU-HSIA;TORNG CHYU-JIUH |
分类号 |
G11B5/127 |
主分类号 |
G11B5/127 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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