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30 条记录 (耗时 0.015 秒)

    Method and apparatus for generating electron spin reversal in ferrimagnetic material
    2.
    发明授权
    Method and apparatus for generating electron spin reversal in ferrimagnetic material 失效
    在铁氧体材料中产生电子自旋反转的方法和装置

    公开(公告)号：US4424580A

    公开(公告)日：1984-01-03

    申请号：US260963

    申请日：1981-05-06

    申请人： Becker Carl H. ,  Werner J. Christmann

    发明人： Becker Carl H. ,  Werner J. Christmann

    IPC分类号： G03G5/16 ,  G11B11/105 ,  G11B11/18 ,  G11C13/06 ,  H01F41/14 ,  G11C13/04

    CPC分类号： H01F41/14 ,  G03G5/16 ,  G11B11/10502 ,  G11B11/10539 ,  G11B11/10545 ,  G11C13/06 ,  G11B11/10584 ,  G11B11/10586

    摘要： Methods and apparatus for reversibly altering magnetic characteristics or domains of ferrimagnetic material by photomagnetic means, particularly by electron spin reversal (spin-flip). Photomagnetic electron spin reversal and inversion creating cylinder domains and their surrounding toroid domains of oppositely directed intrinsic magnetization in ferrimagnetic thin film material are achieved by means of signal modulated circularly polarized laser radiation. Three different stable conditions are detectable. The invention has particular application as a fundamentally new aproach to erasable digital data storage, providing means and methods for photomagnetically alterable and erasable data storage which can be detected by observing polarization of optical radiation directed through the ferrimagnetic material.

    摘要翻译： 通过光磁手段，特别是通过电子自旋反转（旋转翻转）可逆地改变铁磁材料的磁特性或畴的方法和装置。 通过信号调制的圆偏振激光辐射，实现了在亚铁磁性薄膜材料中产生磁畴的反磁反转和产生圆柱体畴及其周向环形区域的相反定向的本征磁化。 可检测到三种不同的稳定条件。 本发明作为可擦除数字数据存储的基本新颖的方法具有特别的应用，提供了可通过观察通过铁氧体材料引导的光辐射的偏振来检测光可变和可擦除数据存储的方法和方法。

    Magnetic recording laser diode control
    7.
    发明授权
    Magnetic recording laser diode control 有权
    磁记录激光二极管控制

    公开(公告)号：US09042207B2

    公开(公告)日：2015-05-26

    申请号：US13890785

    申请日：2013-05-09

    申请人： Seagate Technology LLC

    发明人： Housan Dakroub

    IPC分类号： G11B13/04 ,  G11B5/60 ,  G11B11/105 ,  G11B5/31 ,  G11B5/00

    CPC分类号： G11B5/6088 ,  G11B5/314 ,  G11B11/10539 ,  G11B13/04 ,  G11B2005/0021

    摘要： Controlling a laser diode involves activating a first current source in preparation for writing to a magnetic recording medium. The first current source applies a threshold current to a laser diode that brings the laser diode close to an operating point. Responsive to a write signal, a second current source is activated that applies a write current to the laser diode. A combination of the write current and the threshold current fully energizes the laser diode and is less than a target recording current. Coincident with the activation of the second current source, a photodiode is activated that is optically coupled to the laser diode. The activated photodiode causes a feedback current to be applied to the laser diode.

    摘要翻译： 控制激光二极管涉及激活第一电流源以准备写入磁记录介质。 第一个电流源向激光二极管施加阈值电流，使激光二极管接近工作点。 响应于写入信号，第二电流源被激活，其向激光二极管施加写入电流。 写入电流和阈值电流的组合完全激励激光二极管，并且小于目标记录电流。 与激活第二电流源一致，激活光电二极管，光电耦合到激光二极管。 激活的光电二极管使得反馈电流被施加到激光二极管。

    LIGHT SOURCE ALIGNMENT FOR HEAT ASSISTED MAGNETIC RECORDING
    8.
    发明申请
    LIGHT SOURCE ALIGNMENT FOR HEAT ASSISTED MAGNETIC RECORDING 有权
    用于热辅助磁记录的光源对准

    公开(公告)号：US20140307533A1

    公开(公告)日：2014-10-16

    申请号：US13931019

    申请日：2013-06-28

    申请人： Seagate Technology LLC

    发明人： Chubing Peng

    IPC分类号： G11B5/48 ,  G11B13/04

    CPC分类号： G11B5/4866 ,  G11B5/105 ,  G11B11/10539 ,  G11B13/045 ,  G11B2005/0021

    摘要： An approach for aligning a light source on a slider involves filtering light emerging from the air bearing surface of a (ABS) of a heat assisted magnetic recording (HAMR) slider. A first portion of the emerging light is emitted by a near field transducer in response to optical excitation and has a component having a first polarization state. A second portion of the emerging light including stray light has polarization states different from the first polarization state. The polarizing filter substantially transmits light having the first polarization state and substantially rejects light having a polarization state orthogonal to the first polarization state. Alignment coordinates for the light source are determined based on the light transmitted through the polarizing filter.

    摘要翻译： 用于对准滑块上的光源的方法包括过滤从热辅助磁记录（HAMR）滑块的（ABS）的空气支承表面出射的光。 出射光的第一部分响应于光学激发由近场传感器发射，并且具有具有第一偏振状态的分量。 包括杂散光的出射光的第二部分具有与第一偏振态不同的偏振状态。 偏振滤光器基本透射具有第一偏振态的光，并基本上抑制具有与第一偏振态正交的偏振状态的光。 基于通过偏振滤光器透射的光来确定光源的对准坐标。

    WRITER WITH INCREASED WRITE FIELD
    9.
    发明申请
    WRITER WITH INCREASED WRITE FIELD 有权
    WRITER具有增加的写字段

    公开(公告)号：US20130272104A1

    公开(公告)日：2013-10-17

    申请号：US13843222

    申请日：2013-03-15

    申请人： Kaizhong Gao ,  Michael Mallary ,  Ching He

    发明人： Kaizhong Gao ,  Michael Mallary ,  Ching He

    IPC分类号： G11B11/105

    CPC分类号： G11B11/10539 ,  B82Y10/00 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/314 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3967 ,  G11B5/743 ,  G11B5/82 ,  G11B2005/0021

    摘要： A writer includes a magnetic write pole having a leading surface and a trailing surface and a near field transducer peg spaced from the leading surface of the write pole to provide energy assisted recording. A magnetic recording system for writing to and reading from a continuous magnetic medium includes a write element having a write element tip having a leading edge and a trailing edge, and wherein at least one surface of the write element that extends in a cross-track direction on the continuous magnetic medium has no line of symmetry.

    摘要翻译： 写入器包括具有前表面和后表面的磁写入极和与写极的前表面间隔开的近场换能器，以提供能量辅助的记录。 一种用于对连续磁介质进行写入和读取的磁记录系统包括一写入元件，该写入元件具有一个具有前缘和后缘的写元件尖端，并且其中该写元件的至少一个表面沿横向方向延伸 在连续磁介质上没有对称线。

    Near-field hybrid magnetic-optical head system
    10.
    发明授权
    Near-field hybrid magnetic-optical head system 失效
    近场混合磁光头系统

    公开(公告)号：US06807131B1

    公开(公告)日：2004-10-19

    申请号：US09751301

    申请日：2000-12-27

    申请人： Lambertus Hesselink ,  Douglas G. Stinson ,  Robert L. Thornton ,  Roger F. Malmhäll

    发明人： Lambertus Hesselink ,  Douglas G. Stinson ,  Robert L. Thornton ,  Roger F. Malmhäll

    IPC分类号： G11B1112

    CPC分类号： B82Y10/00 ,  G11B5/10 ,  G11B5/127 ,  G11B7/122 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1387 ,  G11B9/1409 ,  G11B11/10506 ,  G11B11/10508 ,  G11B11/10532 ,  G11B11/10539 ,  G11B11/10554 ,  G11B11/1058 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

    摘要： A hybrid magnetic-optical head apparatus wherein one or more solid state lasers, magnetic field biasing elements, magnetic sensing elements, and an aerodynamically shaped slider comprise a single integrated, monolithic device fabricated from the same base semiconductor material into an optical head. The monolithic optical head can be quickly and easily attached to the read arm of an optical read/write device without requiring attachment of separate laser and magnetic elements, and without micropositioning or use of optical microscopy for positioning the lasers or magnetic elements. The hybrid magnetic-optical head apparatus includes a magnetic-optical function region having a semiconductor laser and at least one magnetic element. Preferably, the magnetic-optical function region of the substrate includes a magnetic field biasing element associated with the semiconductor laser, as well as a magnetic sensing element. The slider portion of the magnetic optical head preferably includes an aerodynamically shaped air cavity as well as an air bearing surface, with the emission face of the laser preferably is substantially co-planar with the air bearing surface. The magnetic-optical function region may be configured for magnetically assisted thermal recording wherein writing is carried out primarily by laser power modulation to selectively heat portions of a medium, together with assistance of an applied magnetic field to establish a preferred direction of magnetization pattern in the medium. The magnetic-optical function region may alternatively be configured for thermally assisted magnetic writing wherein writing is carried out primarily by modulation of magnetic field, together with assistance of a laser which heats the medium to reduce the medium coercivity and thereby assist in the magnetic recording.

    摘要翻译： 一种混合磁光头装置，其中一个或多个固态激光器，磁场偏置元件，磁感应元件和空气动力学形状的滑块包括由相同的基底半导体材料制成光学头的单个集成的单片器件。 单片光学头可以快速且容易地附接到光学读/写设备的读取臂，而不需要附加单独的激光和磁性元件，并且不需要微定位或使用光学显微镜来定位激光器或磁性元件。 混合磁光头装置包括具有半导体激光器和至少一个磁性元件的磁光功能区域。 优选地，基板的磁光功能区域包括与半导体激光器相关联的磁场偏置元件以及磁感应元件。 磁性光学头的滑块部分优选地包括空气动力学形状的空气腔以及空气支承表面，其中激光器的发射面优选地与空气轴承表面大致共面。 磁光功能区域可以被配置用于磁辅助热记录，其中主要通过激光功率调制执行写入，以选择性地加热介质的部分，同时借助所施加的磁场来建立磁化模式的优选方向 中。 可选地，磁光功能区域可以被配置用于热辅助磁写入，其中主要通过磁场的调制进行写入，以及加热介质以降低介质矫顽力从而辅助磁记录的激光器的辅助。