Invention Grant
US08012316B2 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
- Patent Title: FCC-like trilayer AP2 structure for CPP GMR EM improvement
- Patent Title (中): FCC类三层AP2结构,用于CPP GMR EM改进
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Application No.: US12583742Application Date: 2009-08-25
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Publication No.: US08012316B2Publication Date: 2011-09-06
- Inventor: Kunliang Zhang , Dan Abels , Min Li , Chyu-Jiuh Torng , Chen-Jung Chien , Yu-Hsia Chen
- Applicant: Kunliang Zhang , Dan Abels , Min Li , Chyu-Jiuh Torng , Chen-Jung Chien , Yu-Hsia Chen
- 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: C23C14/14
- IPC: C23C14/14

Abstract:
A method of forming 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 Co50Fe50 or Co75Fe25 single layer. MR ratio is also increased and 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.
Public/Granted literature
- US20090314632A1 FCC-like trilayer AP2 structure for CPP GMR EM improvement Public/Granted day:2009-12-24
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