发明名称 |
Magnetic tunnel junction read head using a hybrid, low-magnetization flux guide |
摘要 |
The present invention relates to a magneto-resistive tunnel junction read head having a multi-layer tunnel junction composed of a tunnel barrier layer sandwiched between a ferromagnetic free layer and a ferromagnetic pinned layer. Contiguous with the free layer is a hybrid, low-magnetization, T-shaped flux guide having a rear flux guide portion and a more narrow front flux guide portion. The front flux guide portion constitutes a part of an ABS (Air Bearing Surface). The rear portion entirely covers and overlaps the tunnel junction. The hybrid flux guide has a lower magnetization -than the sensing layer due to the addition of magnetization reducing elements such as Ta or Nb. Using this design, a tunnel junction read head has improved read performance and achieves a high and stable head output for adaptation to ultrahigh density recording.
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申请公布号 |
US6519124(B1) |
申请公布日期 |
2003.02.11 |
申请号 |
US20000621003 |
申请日期 |
2000.07.20 |
申请人 |
TDK CORPORATION |
发明人 |
REDON OLIVIER;ARAKI SATORU |
分类号 |
G01R33/09;G11B5/39;H01F10/14;H01L43/08;(IPC1-7):G11B5/39 |
主分类号 |
G01R33/09 |
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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