MAGNETIC RECORDING METHOD USING MICROWAVE ASSISTED HEAD
    61.
    发明申请
    MAGNETIC RECORDING METHOD USING MICROWAVE ASSISTED HEAD 有权
    使用MICROWAVE辅助头的磁记录方法

    公开(公告)号:US20120127610A1

    公开(公告)日:2012-05-24

    申请号:US13297377

    申请日:2011-11-16

    IPC分类号: G11B5/17

    CPC分类号: G11B5/3133 G11B2005/0024

    摘要: A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.

    摘要翻译: 用于磁记录介质的记录层的磁记录方法使用具有子线圈或微波辐射器的薄膜磁头。 在该方法中,微波扩频(SS)信号施加到子线圈或微波辐射器,微波SS信号包括记录层的铁磁共振(FMR)频率作为频带内的载波,以便 产生平面内的高频磁场,使得记录层的磁化反转磁场Hsw降低。 在记录层的磁化反转磁场Hsw降低的同时进行磁记录。

    MICROWAVE ASSISTED MAGNETIC HEAD
    62.
    发明申请
    MICROWAVE ASSISTED MAGNETIC HEAD 有权
    MICROWAVE辅助磁头

    公开(公告)号:US20120033534A1

    公开(公告)日:2012-02-09

    申请号:US12852775

    申请日:2010-08-09

    IPC分类号: G11B11/00

    摘要: A microwave assisted magnetic head is formed to include a main pole magnetic layer including a main pole; a shielded magnetic layer including a shielded pole; a recording coil that is formed to generate a writing magnetic field from a tip of the main pole; and a microwave radiation waveguide made of a conductive nonmagnetic material that is disposed in a recording gap, the recording gap being a gap between the main pole and the shielded pole. The main pole magnetic layer and the shielded magnetic layer have an intermediate connection part that connects the layers at a depth-side, and an electrical insulation magnetic film is disposed in the intermediate connection part, and the main pole and the shielded pole are electrically connected with the microwave radiation waveguide that is disposed in the recording gap, which is the gap between the main pole and the shielded pole so that a simple configuration, with a relatively easy and efficient manufacturing process, is realized that overlaps AC magnetic fields in an in-plane direction of a microwave band, which is the same as, or close to, a ferromagnetic resonant frequency of a medium recording layer.

    摘要翻译: 微波辅助磁头形成为包括主极的主极磁性层; 包括屏蔽极的屏蔽磁性层; 形成为从主极的尖端产生书写磁场的记录线圈; 以及设置在记录间隙中的由导电非磁性材料制成的微波辐射波导,记录间隙是主极和屏蔽极之间的间隙。 主极磁性层和屏蔽磁性层具有在深度侧连接层的中间连接部,并且在中间连接部中设置电绝缘性的磁性膜,并且主极和屏蔽极电气连接 利用布置在作为主极和屏蔽极之间的间隙的记录间隙中的微波辐射波导,从而实现了具有相对简单和有效的制造工艺的简单配置,其与交流磁场重叠, 与介质记录层的铁磁谐振频率相同或接近的微波频带的平面方向。

    MICROWAVE ASSISTED MAGNETIC HEAD
    63.
    发明申请
    MICROWAVE ASSISTED MAGNETIC HEAD 有权
    MICROWAVE辅助磁头

    公开(公告)号:US20110242696A1

    公开(公告)日:2011-10-06

    申请号:US12750870

    申请日:2010-03-31

    IPC分类号: G11B5/02

    摘要: A gap between a main pole and auxiliary pole composing a thin film magnetic head having a microwave assisted function of the present invention is filled with a nonmagnetic dielectric layer to embed a microwave radiator. The nonmagnetic dielectric layer has an inclined surface at a end on a side of an opposing medium surface by which the microwave radiated from the microwave radiator to be bent toward the main pole, whereby the microwave magnetic field generated from the microwave generator can be gathered immediately below the main pole, further improving the microwave assisted effect.

    摘要翻译: 构成本发明的具有微波辅助功能的薄膜磁头的主极和辅助极之间的间隙填充有非磁性介电层以嵌入微波辐射器。 非磁性介电层在相对的介质表面的一侧的端部具有倾斜表面,微波从微波辐射器辐射到微波辐射器,从而微波发生器产生的微波磁场可以立即收集 主杆下方进一步提高微波辅助效果。

    Thin-Film Magnetic Head Having Microwave Magnetic Exciting Function And Magnetic Recording And Reproducing Apparatus
    64.
    发明申请
    Thin-Film Magnetic Head Having Microwave Magnetic Exciting Function And Magnetic Recording And Reproducing Apparatus 有权
    具有微波激磁功能的薄膜磁头和磁记录和再现装置

    公开(公告)号:US20100073804A1

    公开(公告)日:2010-03-25

    申请号:US12550662

    申请日:2009-08-31

    IPC分类号: G11B5/02

    摘要: A thin-film magnetic head having microwave magnetic exciting function includes a write magnetic field production means for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, and at least line conductor of a microwave radiator of a plane-structure type, formed independent from the write magnetic field production means, for radiating, by feeding there through a microwave excitation current, a microwave band resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency FR of the magnetic recording medium.

    摘要翻译: 具有微波磁激励功能的薄膜磁头包括写入磁场产生装置,用于响应于写入信号产生要施加到磁记录介质中的写入磁场,以及至少微波辐射器的线路导体 的平面结构型,与写入磁场产生装置无关,用于通过微波激励电流向其馈送频率等于或接近铁磁共振频率FR的频率的微波频带共振磁场 的磁记录介质。

    Stabilized spin valve head and method of manufacture
    65.
    发明授权
    Stabilized spin valve head and method of manufacture 有权
    稳定旋转阀头及制造方法

    公开(公告)号:US07599154B2

    公开(公告)日:2009-10-06

    申请号:US10572067

    申请日:2004-04-02

    IPC分类号: G11B5/33

    CPC分类号: G11B5/39 G11B5/1278

    摘要: A magnetoresistive read head includes a spin valve having a multi-layer in-stack bias and side shields to substantially reduce the undesired flux from adjacent bits and tracks, as well as from the transverse field of the recording medium itself. At least one free layer is spaced apart from at least one pinned layer by a spacer. Above the free layer, a capping layer is provided, followed by the in-stack bias, which includes a non-magnetic conductive layer, a ferromagnetic layer having a magnetization fixed by an anti-ferromagnetic layer, and a stabilizing ferromagnetic layer. Additionally, a multilayered side shield is provided, including a thin insulator, a soft buffer layer and a soft side shield layer. As a result, the free layer is shielded from the undesired flux, and recording media having substantially smaller track size and bit size.

    摘要翻译: 磁阻读头包括具有多层叠层偏压和侧屏蔽的自旋阀,以基本上减少来自相邻位和轨道的不需要的磁通,以及从记录介质本身的横向场。 至少一个自由层通过间隔物与至少一个钉扎层隔开。 在自由层之上,提供覆盖层,随后是堆叠间偏压,其包括非磁性导电层,具有由反铁磁层固定的磁化强度的铁磁层和稳定的铁磁层。 此外,提供了一种多层侧屏蔽件,其包括薄绝缘体,软缓冲层和软侧屏蔽层。 结果,自由层屏蔽了不需要的磁通,并且记录介质具有基本上较小的轨迹尺寸和位尺寸。

    Heat assisted magnetic recording head and heat assisted magnetic recording apparatus for heating a recording region in a magnetic recording medium during magnetic recording
    66.
    发明授权
    Heat assisted magnetic recording head and heat assisted magnetic recording apparatus for heating a recording region in a magnetic recording medium during magnetic recording 有权
    热辅助磁记录头和热辅助磁记录装置,用于在磁记录期间加热磁记录介质中的记录区

    公开(公告)号:US07538978B2

    公开(公告)日:2009-05-26

    申请号:US11319164

    申请日:2005-12-28

    IPC分类号: G11B5/00

    摘要: A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

    摘要翻译: 提供了一种热辅助磁记录头,当磁记录区域被加热激光束加热并且可以减小其尺寸和重量时,可以防止激光二极管中的热量的影响。 在热辅助磁记录头中,记录磁极,磁记录元件,磁读取元件,光波导和照射光波导安装在设置在悬架下方的浮动滑块上。 激光二极管布置在与浮动滑块的悬架的相对侧上。 从激光二极管发射的加热激光束通过光波导被引导到照射光波导,使得从记录光波导出射的加热激光束照射磁记录介质。

    Oscillator
    67.
    发明授权
    Oscillator 有权
    振荡器

    公开(公告)号:US07473478B2

    公开(公告)日:2009-01-06

    申请号:US11320821

    申请日:2005-12-30

    IPC分类号: G11B5/39 H01L41/00

    摘要: A compact oscillator in which the oscillation frequency can be adjusted to a desired value is provided. The oscillator includes: a magnetoresistive effect element comprising a pinned layer, a nonmagnetic spacer layer, and a free layer of which magnetization direction is changeable that are stacked in that order, a magnetization direction of the pinned layer being substantially fixed along a direction perpendicular to a stack direction; a bias magnetic field application unit for applying a bias magnetic field to the free layer in a direction that is perpendicular to the stack direction and is different from the magnetization direction of the pinned layer; and an adjusting magnetic field application unit for applying an adjusting magnetic field to the free layer in a direction that is perpendicular to the stack direction and is different from the direction of the bias magnetic field.

    摘要翻译: 提供了可以将振荡频率调节到期望值的紧凑型振荡器。 所述振荡器包括:磁阻效应元件,其包括被钉扎层,非磁性间隔层以及沿其顺序层叠磁化方向可变的自由层,所述被钉扎层的磁化方向基本上沿垂直于 堆栈方向 偏置磁场施加单元,用于在垂直于堆叠方向并且与被钉扎层的磁化方向不同的方向上将自由层施加偏置磁场; 以及调整用磁场施加单元,用于在垂直于堆叠方向的方向上向自由层施加调节磁场,并且不同于偏置磁场的方向。

    Magnetoresistance effect element and magnetic head

    公开(公告)号:US07280323B2

    公开(公告)日:2007-10-09

    申请号:US11657504

    申请日:2007-01-23

    IPC分类号: G11B5/39

    CPC分类号: H01L43/08 G11B5/3912

    摘要: A magnetoresistance effect element has a lamination structure comprising a free layer including two ferromagnetic layers, a pinned layer including two ferromagnetic layers, and at least one nano-contact portion composed of a single ferromagnetic layer and disposed at least one portion between the free layer and the pinned layer. A distance between the free layer and the pinned layer, i.e., thickness of the nano-contact portion in the lamination direction, is not more than Fermi length, preferably less than 100 nm.

    Stabilized spin valve head and method of manufacture
    69.
    发明申请
    Stabilized spin valve head and method of manufacture 有权
    稳定旋转阀头及制造方法

    公开(公告)号:US20070091513A1

    公开(公告)日:2007-04-26

    申请号:US10572067

    申请日:2004-04-02

    IPC分类号: G11B5/33

    CPC分类号: G11B5/39 G11B5/1278

    摘要: A magnetoresistive read head includes a spin valve having a multi-layer in-stack bias and side shields to substantially reduce the undesired flux from adjacent bits and tracks, as well as from the transverse field of the recording medium itself. At least one free layer is spaced apart from at least one pinned layer by a spacer. Above the free layer, a capping layer is provided, followed by the in-stack bias, which includes a non-magnetic conductive layer, a ferromagnetic layer having a magnetization fixed by an anti-ferromagnetic layer, and a stabilizing ferromagnetic layer. Additionally, a multilayered side shield is provided, including a thin insulator, a soft buffer layer and a soft side shield layer. As a result, the free layer is shielded from the undesired flux, and recording media having substantially smaller track size and bit size.

    摘要翻译: 磁阻读头包括具有多层叠层偏压和侧屏蔽的自旋阀,以基本上减少来自相邻位和轨道的不需要的磁通,以及从记录介质本身的横向场。 至少一个自由层通过间隔物与至少一个钉扎层隔开。 在自由层之上,提供覆盖层,随后是堆叠间偏压,其包括非磁性导电层,具有由反铁磁层固定的磁化强度的铁磁层和稳定的铁磁层。 此外,提供了一种多层侧屏蔽件,其包括薄绝缘体,软缓冲层和软侧屏蔽层。 结果,自由层屏蔽了不需要的磁通,并且记录介质具有基本上较小的轨迹尺寸和位尺寸。

    Composite free layer for stabilizing magnetoresistive head
    70.
    发明申请
    Composite free layer for stabilizing magnetoresistive head 有权
    用于稳定磁阻头的复合自由层

    公开(公告)号:US20070002503A1

    公开(公告)日:2007-01-04

    申请号:US10572072

    申请日:2004-04-04

    IPC分类号: G11B5/33 G11B5/127

    摘要: A magnetoresistive read head includes a spin valve having at least one free layer spaced apart from at least one pinned layer by a spacer. The free layer includes a cobalt compound as a thin film including at least one of Co—X, CoFe—X and CoNi—X, where X is an element from the lanthanoid family (a 4-f element). The content of Co is higher than 80 percent, and the content of the lanthanoid element is less than 10 percent. The film may comprise the entire free layer, or be positioned adjacent to one or more conventional free layer films. The pinned layer is a conventional single layer, or a synthetic multi-layered structure having a spacer between sub-layers. Because the spin valve structure has a high exchange stiffness and damping factor, spin transfer effect is reduced and a high-speed dynamic response is provided.

    摘要翻译: 磁阻读取头包括具有至少一个自由层的自旋阀,所述至少一个自由层通过间隔件与至少一个钉扎层隔开。 自由层包括钴化合物作为薄膜,其包括Co-X,CoFe-X和CoNi-X中的至少一种,其中X是来自镧系元素族的元素(4-f元素)。 Co含量高于80%,镧系元素含量低于10%。 膜可以包括整个自由层,或者被定位成与一个或多个常规的自由层膜相邻。 被钉扎层是常规单层,或在子层之间具有间隔物的合成多层结构。 因为自旋阀结构具有较高的交换刚度和阻尼因子,所以自旋转移效应降低,并提供高速动态响应。