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    • 2. 发明申请
    • SUPPRESSION OF THERMAL NOISE USING SPIN TRANSFER IN MAGNETORESISTIVE ELEMENTS
    • 使用电磁元件中的旋转传递来抑制热噪声
    • WO2004032157A1
    • 2004-04-15
    • PCT/US2003/029913
    • 2003-09-25
    • SEAGATE TECHNOLOGY LLC
    • COVINGTON, Mark, W.
    • H01F10/32
    • B82Y25/00H01F10/324H01F10/3254H01F10/3268H01F10/3272H01F10/329H01F41/325
    • A system and method of reducing noise due to thermally activated spin waves in a magnetoresistive (MR) element 30 is disclosed. The MR element 30 includes a free layer 32, a reference layer 36, and a spacer layer 34, the spacer layer 34 being positioned between the free layer 32 and the reference layer 36. To reduce noise, a magnetization of the reference layer 36 is pinned in a fixed direction. A spin polarized current perpendicular to a plane of the free layer 32, reference layer 36, and spacer layer 34 is subsequently produced such that the current exerts a spin momentum transfer torque on localized electron spins to reduce noise due to thermally activated spin waves. The spin momentum transfer torque opposes the intrinsic damping of the free layer 32, thereby reducing noise in the MR element 30.
    • 公开了一种在磁阻(MR)元件30中降低由热激活自旋波引起的噪声的系统和方法。 MR元件30包括自由层32,参考层36和间隔层34,间隔层34位于自由层32和参考层36之间。为了降低噪声,参考层36的磁化是 固定在固定的方向。 随后产生垂直于自由层32,参考层36和间隔层34的平面的自旋极化电流,使得电流在局部电子自旋上施加自旋动量传递扭矩,以减少由于热激活的自旋波引起的噪声。 自旋动量传递扭矩与自由层32的固有阻尼相反,从而降低MR元件30中的噪声。
    • 7. 发明申请
    • METHOD AND SYSTEM FOR PROVIDING A HIGHLY TEXTURED MAGNETORESISTANCE ELEMENT AND MAGNETIC MEMORY
    • 提供高纹理磁阻元件和磁记忆的方法和系统
    • WO2006063007A2
    • 2006-06-15
    • PCT/US2005044180
    • 2005-12-06
    • GRANDIS INCPAKALA MAHENDRAVALET THIERRYHUAI YIMINGDIAO ZHITAO
    • PAKALA MAHENDRAVALET THIERRYHUAI YIMINGDIAO ZHITAO
    • H01L21/00
    • H01L43/08B82Y25/00B82Y40/00H01F10/3254H01F10/3263H01F10/3272H01F10/3281H01F41/302H01F41/325
    • A method and system for providing a magnetic element are disclosed. The method and system include providing a pinned layer, a free layer, and a spacer layer between the pinned layer and the free layer. The spacer layer is insulating and has an ordered crystal structure. The spacer layer is also configured to allow tunneling through the spacer layer. In one aspect, the free layer is comprised of a single magnetic layer having a particular crystal structure and texture with respect to the spacer layer. In another aspect, the free layer is comprised of two sublayers, the first sublayer having a particular crystal structure and texture with respect to the spacer layer and the second sublayer having a lower moment. In still another aspect, the method and system also include providing a second pinned layer and a second spacer layer that is nonmagnetic and resides between the free layer and the second pinned layer. The magnetic element is configured to allow the free layer to be switched due to spin transfer when a write current is passed through the magnetic element.
    • 公开了一种用于提供磁性元件的方法和系统。 该方法和系统包括在被钉扎层和自由层之间提供钉扎层,自由层和间隔层。 间隔层是绝缘的并且具有有序晶体结构。 间隔层还被构造成允许穿过间隔层的隧穿。 在一个方面,自由层由相对于间隔层具有特定晶体结构和纹理的单个磁性层组成。 在另一方面,自由层由两个子层组成,第一子层相对于间隔层具有特定的晶体结构和纹理,而第二子层具有较低的力矩。 在另一方面,该方法和系统还包括提供非磁性的第二被钉扎层和第二间隔层,并且位于自由层和第二钉扎层之间。 磁性元件被配置为当写入电流通过磁性元件时由于自旋转移而允许自由层被切换。
    • 9. 发明申请
    • SPIN VALVE SENSOR WITH SPECULAR ELECTRON SCATTERING IN FREE LAYER
    • 旋转阀传感器,具有自由层中的电子散射
    • WO00063715A1
    • 2000-10-26
    • PCT/US1999/020151
    • 1999-09-02
    • G01R33/09G11B5/39H01F10/16H01F10/32H01L43/08
    • B82Y25/00B82Y10/00G01R33/093G11B5/3903G11B2005/3996H01F10/3268H01F10/3295H01F41/325
    • A spin valve sensor (70) is disclosed, comprising a ferromagnetic free layer (76), a ferromagnetic pinned layer (80), a layer of non-ferromagnetic material (78) positioned between the free layer (76) and the pinned layer (80), and an antiferromagnetic pinning layer (82) positioned adjacent to the pinned layer (80) such that the pinning layer (82) is in direct contact with the pinned layer (80). The free layer (76) comprises a multi-layer stack including a non-magnetic insulating spacer (96) positioned between a first and a second ferromagnetic sublayer (94 and 98). The non-magnetic insulating spacer (96) provides a specular electron scattering effect. The first and the second ferromagnetic sublayers (94 and 98) each have passive end regions separated by a central active region. The spin valve sensor (70) further includes bias means (86 and 88) positioned between the first and the second ferromagnetic sublayers (94 and 98) in the passive end regions. The bias means (86 and 88) produces a longitudinal bias in the passive end regions of a level sufficient to maintain the active central region of the ferromagnetic sublayers (94 and 98) in a single domain state.
    • 公开了一种自旋阀传感器(70),其包括铁磁性自由层(76),铁磁性钉扎层(80),位于自由层(76)和被钉扎层(80)之间的非铁磁材料层 80)和与钉扎层(80)相邻定位的反铁磁钉扎层(82),使得钉扎层(82)与钉扎层(80)直接接触。 自由层(76)包括多层堆叠,其包括位于第一和第二铁磁性子层(94和98)之间的非磁性绝缘间隔物(96)。 非磁性绝缘间隔物(96)提供镜面电子散射效应。 第一和第二铁磁子层(94和98)各自具有被中心有源区分隔的被动端区域。 自旋阀传感器(70)还包括位于无源端区域中的第一和第二铁磁子层(94和98)之间的偏置装置(86和88)。 偏置装置(86和88)在被动端部区域中产生足以将铁磁子层(94和98)的活性中心区域维持在单一畴状态的水平面上的纵向偏压。
    • 10. 发明申请
    • SPIN OSCILLATOR DEVICE
    • 旋转振荡器装置
    • WO2015156727A1
    • 2015-10-15
    • PCT/SE2015/050410
    • 2015-04-02
    • ÅKERMAN, Johan
    • ÅKERMAN, Johan
    • H03B15/00G11C11/16H01F10/32H01L29/82
    • H03B15/006G11B5/3909G11C11/161G11C11/1675H01F10/3286H01F41/325H01L43/02H01L43/04H01L43/06H01L43/08H03L7/26
    • The present invention relates to using spin transfer torque underneath a nanocontact on a magnetic thin film with perpendicular magnetic anisotropy (PMA), provides generation of dissipative magnetic droplet solitons and magnetic droplet-skyrmions and report on their rich dynamical properties. Micromagnetic simulations identify the conditions necessary to nucleate and drive droplet-skyrmions over a wide range of currents and fields. Micromagnetic simulations also demonstrate how droplets and droplet-skyrmions can be used as skyrmion injectiors and detectors in skyrmion-based magnetic memories. The droplet-skyrmion can be controlled using both current and magnetic fields, and is expected to have applications in spintronics, magnonics, skyrmionics, and PMA-based domain-wall devices.
    • 本发明涉及在具有垂直磁各向异性(PMA)的磁性薄膜上使用纳米接触下的自旋转移转矩,提供了耗散的磁滴孤子和磁滴飞溅的产生,并报告了它们的丰富的动力特性。 微电磁模拟确定了在宽范围的电流和场下成核和驱动液滴飞行所需的条件。 微磁场模拟还证明了如何使用液滴和液滴滴定作为基于天线的磁存储器中的天线注入和检测器。 可以使用电场和磁场来控制液滴滴定,并且预计可以应用于自旋电子学,磁学,电磁学和基于PMA的畴壁设备。