发明名称 |
Tunneling magnetoresistive head and a process of tunneling magnetoresistive head |
摘要 |
There is proposed a high-sensitive TMR element wherein the selection of electronic state contributing to tunnel conduction is optimized. In this invention, a junction plane between a ferromagnetic layer (210) having a bcc structure and a tunnel barrier layer (310) is constituted by (211) plane or (110) plane of the ferromagnetic layer (210). The tunnel barrier layer (310) is formed of a thin aluminum oxide film which is formed through two stages, i.e. a first stage wherein an aluminum film having a thickness of 1 nm or less is formed on the surface of a magnetic metal by taking advantage of the excellent wettability of aluminum to the surface of metallic film, the resultant aluminum film being subsequently naturally oxidized or oxidized by oxygen radical; and a second stage wherein an aluminum thin film is formed directly from an aluminum flux in an oxygen atmosphere or an atmosphere of oxygen radical.
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申请公布号 |
US6710986(B1) |
申请公布日期 |
2004.03.23 |
申请号 |
US20000666608 |
申请日期 |
2000.09.20 |
申请人 |
HITACHI, LTD.;AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY |
发明人 |
SATO TOSHIHIKO;YUASA SHINJI |
分类号 |
G01R33/09;G11B5/39;H01F10/30;H01F10/32;H01L43/08;H01L43/12;(IPC1-7):G11B5/33 |
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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