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    • 13. 发明授权
    • Magnetic tunnel device
    • 磁隧道装置
    • US6103406A
    • 2000-08-15
    • US90671
    • 1998-06-04
    • Seiji Kumagai
    • Seiji Kumagai
    • G11B5/39G01R33/09H01F10/00H01F10/32H01L43/00H01L43/08G11B5/66
    • B82Y25/00G01R33/093G01R33/098H01F10/3227H01L43/08Y10S428/90Y10T428/1171
    • A novel magnetic tunnel device capable of displaying a magnetic tunnelling effect in stability and with high sensitivity even to an external magnetic field of a weak intensity. The magnetic tunnel device 1 has a layered structure including a first magnetic layer 2, a granular layer 3 layered on the first magnetic layer 2 and a second magnetic layer 4 layered on the surface of the granular layer 3 opposite to its surface carrying the first magnetic layer 2. The granular layer 3 has a granular structure which is made up of a magnetic metal phase 7 and an insulating phase 8. The first magnetic layer 2 and/or the second magnetic layer 4 of the magnetic tunnel device is formed of a ferromagnetic material having soft magnetic properties. The current is supplied in the layering direction of the layered structure.
    • 一种能够稳定地显示磁隧道效应并且即使对于弱强度的外部磁场也具有高灵敏度的新型磁隧道装置。 磁隧道装置1具有包括第一磁性层2,层叠在第一磁性层2上的粒状层3和层叠在粒状层3的表面上的第二磁性层4的层叠结构,该第二磁性层4与承载第一磁性层 颗粒层3具有由磁性金属相7和绝缘相8构成的粒状结构。磁隧道器件的第一磁性层2和/或第二磁性层4由铁磁体 具有软磁特性的材料。 以分层结构的层叠方向供给电流。
    • 14. 发明授权
    • Magnetic head
    • 磁头
    • US5936815A
    • 1999-08-10
    • US931743
    • 1997-09-16
    • Seiji KumagaiJunichi HondaNorikatsu FujisawaKyu Kanno
    • Seiji KumagaiJunichi HondaNorikatsu FujisawaKyu Kanno
    • G11B5/31G11B5/127G11B5/187G11B5/23G11B5/147
    • G11B5/1276G11B5/1878G11B5/127G11B5/1272
    • A thin film type magnetic head that electromagnetic conversion efficiency is improved by making gradually magnetic resistance larger with approaching to a magnetic gap can be provided. There is disclosed a magnetic head including a pair of magnetic core half members having nonmagnetic substrates and magnetic metal films formed on the nonmagnetic substrates and a coil formed at a concave part by a thin film forming process, the pair of magnetic core half members being jointed to each other opposite to each other through a magnetic gap formed between the respective magnetic metal films, the concave part formed on the surface formed by joining at least one of the magnetic metal films and the other magnetic metal film, wherein assistant cores consisting of magnetic materials are joined on the side of the surface by joining a pair of nonmagnetic substrates and the magnetic metal films are formed connected with the assistant cores.
    • 可以提供通过使接近磁隙逐渐变大的磁阻来提高电磁转换效率的薄膜型磁头。 公开了一种磁头,其包括具有非磁性基板的一对磁芯半部件和形成在非磁性基板上的磁性金属膜,以及通过薄膜形成工艺在凹部形成的线圈,所述一对磁芯半体连接 通过形成在各个磁性金属膜之间的磁隙彼此相对,通过接合至少一个磁性金属膜和另一个磁性金属膜形成的表面上形成的凹部,其中由磁性金属膜组成的辅助芯 材料通过连接一对非磁性基底而在表面的一侧接合,并且形成与辅助芯相连接的磁性金属膜。
    • 15. 发明授权
    • Magnetic head
    • 磁头
    • US5475551A
    • 1995-12-12
    • US272324
    • 1994-07-08
    • Junichi HondaSeiji KumagaiNorikatsu FujisawaMasatoshi HayakawaMasahiro KikkawaMiho Suzuki
    • Junichi HondaSeiji KumagaiNorikatsu FujisawaMasatoshi HayakawaMasahiro KikkawaMiho Suzuki
    • G11B5/133G11B5/187G11B5/193G11B5/23G11B5/235
    • G11B5/235G11B5/193
    • A magnetic head has a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is formed of platinum, the platinum group, or an alloy consisting mainly of platinum or the platinum group. The pair of magnetic core substrates are bonded to each other to be integrated into one unit by a non-magnetic glass. The magnetic gap has a track width of not greater than 50 .mu.m. The gap film has a thickness of not greater than 150 nm. The magnetic head includes a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is selectively formed of Cr or an alloy consisting mainly of Cr, Ti or an alloy consisting mainly of Ti, or Ta.sub.2 O.sub.5 or an oxide consisting mainly of Ta.sub.2 O.sub.5. At least one of the pair of magnetic core substrates has its abutment surface inversely sputtered and then has a gap film formed thereon.
    • 磁头具有由氧化物磁性材料形成的一对磁芯基板,所述磁芯基板中的至少一个在其邻接表面上形成有间隙膜,所述一对磁芯基板在间隙上彼此抵接 膜作为邻接表面,在它们之间形成有磁隙。 间隙膜由铂,铂族基团或主要由铂或铂族组成的合金形成。 一对磁芯基板通过非磁性玻璃彼此结合成一个单元。 磁隙具有不大于50μm的轨道宽度。 间隙膜的厚度不大于150nm。 磁头包括由氧化物磁性材料形成的一对磁芯基板,至少一个磁芯基板在其邻接表面上形成有间隙膜,该一对磁芯基板在间隙上彼此抵接 膜作为邻接表面,在它们之间形成有磁隙。 间隙膜由Cr或主要由Cr,Ti或主要由Ti或Ta2O5组成的合金或主要由Ta 2 O 5组成的氧化物组成的合金选择性地形成。 所述一对磁芯基板中的至少一个具有抵靠面反向溅射,然后在其上形成间隙膜。