Three-terminal design for spin accumulation magnetic sensor
    2.
    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

    IPC分类号: G11B5/33

    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。

    THREE-TERMINAL DESIGN FOR SPIN ACCUMULATION MAGNETIC SENSOR
    5.
    发明申请
    THREE-TERMINAL DESIGN FOR SPIN ACCUMULATION MAGNETIC SENSOR 有权
    用于旋转累积磁传感器的三端设计

    公开(公告)号:US20100296202A1

    公开(公告)日:2010-11-25

    申请号:US12470827

    申请日:2009-05-22

    IPC分类号: G11B5/33

    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。

    IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES
    10.
    发明申请
    IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES 有权
    用于硬盘驱动器的增强型集成式解调器实现旋转振动振荡器感应

    公开(公告)号:US20130148224A1

    公开(公告)日:2013-06-13

    申请号:US13316419

    申请日:2011-12-09

    IPC分类号: G11B20/06

    摘要: A method, apparatus, and system are provided for implementing spin-torque oscillator sensing with an enhanced integrated demodulator for hard disk drives. The demodulator receives an input signal from a STO read sensor having an oscillation frequency ω related to the strength of the detected magnetic signal field. The demodulator includes a pair of mixers coupled to a quadrature reference oscillator with respective quadrature components cos(ω0t), and sin(ω0t) of the quadrature reference oscillator being mixed with a received input signal to form signals at the sum and difference frequencies, ω±ω0. Each of these mixer products is lowpass filtered by a respective a lowpass filter to remove the sum frequency components for providing a demodulator output signal that is directly proportional the STO oscillation frequency ω. The demodulator output signal is used for processing by data detection electronics.

    摘要翻译: 提供了一种用于通过用于硬盘驱动器的增强型集成解调器来实现自旋扭矩振荡器感测的方法,装置和系统。 解调器接收来自具有与所检测的磁信号场的强度相关的振荡频率ω的STO读取传感器的输入信号。 解调器包括耦合到具有相应正交分量cos(ωωt)的正交参考振荡器的正交参考振荡器对,并且正交基准振荡器的sin(ω0t)与接收的输入信号混合以形成和频率和差频率ω ±omega0。 这些混频器产品中的每一个由相应的低通滤波器进行低通滤波,以去除和频分量,以提供与STO振荡频率ω直接成比例的解调器输出信号。 解调器输出信号用于数据检测电子设备的处理。