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    Three-terminal spin-torque oscillator (STO)
    7.
    发明授权
    Three-terminal spin-torque oscillator (STO) 有权
    三端自旋转矩振荡器（STO）

    公开(公告)号：US08320080B1

    公开(公告)日：2012-11-27

    申请号：US13149419

    申请日：2011-05-31

    申请人： Patrick Mesquita Braganca ,  Bruce Alvin Gurney ,  Jordan Asher Katine

    发明人： Patrick Mesquita Braganca ,  Bruce Alvin Gurney ,  Jordan Asher Katine

    IPC分类号： G11B5/127 ,  G11B5/187

    CPC分类号： H01F10/3254 ,  G01R33/098 ,  G01R33/1284 ,  G11B5/3903 ,  G11B2005/0005 ,  H01F10/1936 ,  H01F10/3286 ,  H01F10/329 ,  H01L43/08

    摘要： A spin-torque oscillator (STO) has a single free ferromagnetic layer that forms part of both a giant magnetoresistance (GMR) structure with a nonmagnetic conductive spacer layer and a tunneling magnetoresistance (TMR) structure with a tunnel barrier layer. The STO has three electrical terminals that connect to electrical circuitry that provides a spin-torque excitation current through the conductive spacer layer and a lesser sense current through the tunnel barrier layer. When the STO is used as a magnetic field sensor, the excitation current causes the magnetization of the free layer to oscillate at a fixed base frequency in the absence of an external magnetic field. A detector coupled to the sense current detects shifts in the free layer magnetization oscillation frequency from the base frequency in response to external magnetic fields.

    摘要翻译： 自旋转矩振荡器（STO）具有单个自由铁磁层，其形成具有非磁性导电间隔层的巨磁电阻（GMR）结构和具有隧道势垒层的隧道磁阻（TMR）结构的一部分。 STO具有三个电气端子，其连接到通过导电间隔层提供自旋转矩激励电流的电路和通过隧道势垒层的较小感测电流。 当STO用作磁场传感器时，激励电流使得自由层的磁化在没有外部磁场的情况下以固定的基频振荡。 耦合到感测电流的检测器响应于外部磁场检测自由层磁化振荡频率从基极频率的偏移。

    THREE-TERMINAL SPIN-TORQUE OSCILLATOR (STO)
    8.
    发明申请
    THREE-TERMINAL SPIN-TORQUE OSCILLATOR (STO) 有权
    三端旋转振荡器（STO）

    公开(公告)号：US20120307404A1

    公开(公告)日：2012-12-06

    申请号：US13149419

    申请日：2011-05-31

    申请人： Patrick Mesquita Braganca ,  Bruce Alvin Gurney ,  Jordan Asher Katine

    发明人： Patrick Mesquita Braganca ,  Bruce Alvin Gurney ,  Jordan Asher Katine

    IPC分类号： G11B5/48 ,  H03B7/14

    CPC分类号： H01F10/3254 ,  G01R33/098 ,  G01R33/1284 ,  G11B5/3903 ,  G11B2005/0005 ,  H01F10/1936 ,  H01F10/3286 ,  H01F10/329 ,  H01L43/08

    摘要： A spin-torque oscillator (STO) has a single free ferromagnetic layer that forms part of both a giant magnetoresistance (GMR) structure with a nonmagnetic conductive spacer layer and a tunneling magnetoresistance (TMR) structure with a tunnel barrier layer. The STO has three electrical terminals that connect to electrical circuitry that provides a spin-torque excitation current through the conductive spacer layer and a lesser sense current through the tunnel barrier layer. When the STO is used as a magnetic field sensor, the excitation current causes the magnetization of the free layer to oscillate at a fixed base frequency in the absence of an external magnetic field. A detector coupled to the sense current detects shifts in the free layer magnetization oscillation frequency from the base frequency in response to external magnetic fields.

    摘要翻译： 自旋转矩振荡器（STO）具有单个自由铁磁层，其形成具有非磁性导电间隔层的巨磁电阻（GMR）结构和具有隧道势垒层的隧道磁阻（TMR）结构的一部分。 STO具有三个电气端子，其连接到通过导电间隔层提供自旋转矩激励电流的电路和通过隧道势垒层的较小感测电流。 当STO用作磁场传感器时，激励电流使得自由层的磁化在没有外部磁场的情况下以固定的基频振荡。 耦合到感测电流的检测器响应于外部磁场检测自由层磁化振荡频率从基极频率的偏移。

    Three-terminal design for spin accumulation magnetic sensor
    9.
    发明授权
    Three-terminal design for spin accumulation magnetic sensor 有权
    自旋累积磁传感器的三端设计

    公开(公告)号：US08760817B2

    公开(公告)日：2014-06-24

    申请号：US12470827

    申请日：2009-05-22

    申请人： Thomas Dudley Boone, Jr. ,  Bruce Alvin Gurney ,  Neil Smith

    发明人： Thomas Dudley Boone, Jr. ,  Bruce Alvin Gurney ,  Neil Smith

    IPC分类号： G11B5/33

    CPC分类号： G11B5/39 ,  G01R33/098 ,  G01R33/1284 ,  G11B5/398 ,  G11B2005/0005

    摘要： A spin accumulation sensor having a three terminal design that allows the free layer to be located at the air bearing surface. A non-magnetic conductive spin transport layer extends from a free layer structure (located at the ABS) to a reference layer structure removed from the ABS. The sensor includes a current or voltage source for applying a current across a reference layer structure. The current or voltage source has a lead that is connected with the non-magnetic spin transport layer and also to electric ground. Circuitry for measuring a signal voltage measures a voltage between a shield that is electrically connected with the free layer structure and the ground. The free layer structure can include a spin diffusion layer that ensures that all spin current is completely dissipated before reaching the lead to the voltage source, thereby preventing shunting of the spin current to the voltage source.

    摘要翻译： 具有允许自由层位于空气轴承表面的三端设计的自旋累积传感器。 非磁性导电自旋传输层从自由层结构（位于ABS处）延伸到从ABS去除的参考层结构。 传感器包括用于在参考层结构上施加电流的电流或电压源。 电流源或电压源具有与非磁性自旋传输层连接的引线，也与电接地连接。 用于测量信号电压的电路测量与自由层结构电连接的屏蔽与地之间的电压。 自由层结构可以包括自旋扩散层，其确保在到达电压源的引线之前所有自旋电流完全消散，从而防止自旋电流分流到电压源。