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    • 3. 发明授权
    • Magnetic head
    • 磁头
    • US08630070B2
    • 2014-01-14
    • US13207802
    • 2011-08-11
    • Rie SatoKoichi Mizushima
    • Rie SatoKoichi Mizushima
    • G11B5/33
    • G11B5/3903G01R33/098G11B2005/0024H01F10/3254H01F10/329
    • According to one embodiment, there is provided a magnetic head for a three-dimensional magnetic recording/reproducing apparatus, the head executing reading from or writing to a recording medium, utilizing a magnetic resonance, the medium including stacked layers formed of magnetic substances having different resonance frequencies, the head comprising a spin torque oscillation unit and auxiliary magnetic poles. The unit is operable to simultaneously oscillate at a plurality of frequencies to cause the magnetic resonance, when reading or writing. The magnetic poles assist the unit, when reading or writing. Further, according to another embodiment, there is provided a recording magnetic head using a high-frequency assist method and comprising a microwave magnetic field applying unit and a recording magnetic pole. The unit executes writing to a recording medium, and is formed of a plurality of spin torque oscillation elements having phases thereof synchronized. The magnetic pole assists the writing.
    • 根据一个实施例,提供了一种用于三维磁记录/再现装置的磁头,头部利用磁共振来执行从记录介质的读取或向记录介质写入,该介质包括由具有不同的磁性物质形成的层叠层 谐振频率,头部包括自旋扭矩振荡单元和辅助磁极。 该单元可操作以在读取或写入时以多个频率同时振荡以引起磁共振。 当阅读或写入时,磁极帮助单元。 此外,根据另一实施例,提供了一种使用高频辅助方法并包括微波磁场施加单元和记录磁极的记录磁头。 该单元对记录介质执行写入,并且由其相位同步的多个自旋转矩振荡元件形成。 磁极帮助写作。
    • 5. 发明申请
    • MAGNETIC OSCILLATION ELEMENT
    • 磁振荡元件
    • US20120032763A1
    • 2012-02-09
    • US13216968
    • 2011-08-24
    • Kiwamu KUDOKoichi MizushimaTazumi NagasawaRie Sato
    • Kiwamu KUDOKoichi MizushimaTazumi NagasawaRie Sato
    • H01F7/00
    • H03B15/006H01L43/08
    • According to one embodiment, magnetization directions of a magnetic free layer and a magnetic pinned layer are parallel to junction planes between the magnetic free layer and a spacer layer and between the magnetic pinned layer and the spacer layer. The magnetic free layer has a uniaxial magnetic anisotropy, and generates a magnetization oscillation when a current larger than an oscillation threshold current flows through the magnetic free layer. A magnetic field generator controls a magnitude and a direction of an external magnetic field to cancel a shift amount of an oscillation frequency caused by a diamagnetic field due to the magnetization oscillation and a shift amount of the oscillation frequency caused by a magnetic field due to the uniaxial magnetic anisotropy.
    • 根据一个实施例,磁性自由层和磁性被钉扎层的磁化方向平行于磁性自由层和间隔层之间以及磁性被钉扎层和间隔层之间的结面。 磁性自由层具有单轴磁各向异性,并且当大于振荡阈值电流的电流流过无磁层时,产生磁化振动。 磁场发生器控制外部磁场的大小和方向,以抵消由于磁化振动引起的由抗磁场引起的振荡频率的偏移量和由于磁场引起的磁场引起的振荡频率的偏移量 单轴磁各向异性。
    • 10. 发明授权
    • Spin valve transistor
    • 自旋阀晶体管
    • US06833598B2
    • 2004-12-21
    • US10320648
    • 2002-12-17
    • Rie SatoKoichi Mizushima
    • Rie SatoKoichi Mizushima
    • H01L2982
    • H01L29/66984
    • There is provided a spin valve transistor that comprises a collector region made of semiconductor, a base region provided on the collector region and including a first ferromagnetic layer whose magnetization direction changes in accordance with a direction of an external magnetic field, a barrier layer provided on the base layer and made of insulator or semiconductor, and an emitter region provided on the barrier layer and including a second ferromagnetic layer whose magnetization direction is fixed.
    • 提供了一种自旋阀晶体管,其包括由半导体制成的集电极区域,设置在集电极区域上的基极区域,并且包括其磁化方向根据外部磁场的方向而变化的第一铁磁层,设置在其上的阻挡层 所述基底层由绝缘体或半导体制成,以及设置在所述阻挡层上并包括其磁化方向固定的第二铁磁层的发射极区域。