发明申请
US20110026168A1 CURRENT-PERPENDICULAR-TO-THE-PLANE (CPP) MAGNETORESISTIVE SENSOR WITH CoFeGe FERROMAGNETIC LAYERS AND Ag OR AgCu SPACER LAYER
有权
具有CoFeGe FERROMAGNETIC LAYERS和Ag或AgCu间隔层的电流 - 平面（CPP）磁感应传感器
- 专利标题： CURRENT-PERPENDICULAR-TO-THE-PLANE (CPP) MAGNETORESISTIVE SENSOR WITH CoFeGe FERROMAGNETIC LAYERS AND Ag OR AgCu SPACER LAYER
- 专利标题（中）： 具有CoFeGe FERROMAGNETIC LAYERS和Ag或AgCu间隔层的电流 - 平面（CPP）磁感应传感器
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申请号： US12904060申请日： 2010-10-13
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公开(公告)号： US20110026168A1公开(公告)日： 2011-02-03
- 发明人: Matthew J. Carey , Jeffrey R. Childress , Stefan Maat
- 申请人： Matthew J. Carey , Jeffrey R. Childress , Stefan Maat
- 主分类号： G11B5/127
- IPC分类号： G11B5/127
摘要：
A current-perpendicular-to-the-plane spin-valve (CPP-SV) magnetoresistive sensor has a ferromagnetic alloy comprising Co, Fe and Ge in the sensor's free layer and/or pinned layer and a spacer layer of Ag, Cu or a AgCu alloy between the free and pinned layers. The sensor may be a simple pinned structure, in which case the pinned layer may be formed of the CoFeGe ferromagnetic alloy. Alternatively, the sensor may have an AP-pinned layer structure, in which case the AP2 layer may be formed of the CoFeGe ferromagnetic alloy. The Ge-containing alloy comprises Co, Fe and Ge, wherein Ge is present in the alloy in an amount between about 20 and 40 atomic percent, and wherein the ratio of Co to Fe in the alloy is between about 0.8 and 1.2. More particularly, the CoFeGe alloy may consist essentially of only Co, Fe and Ge according to the formula (CoxFe(100-x))(100-y)Gey where the subscripts represent atomic percent, x is between about 45 and 55, and y is between about 23 and 37.