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    Systems and Methods for Data Write Loopback Based Timing Control
    93.
    发明申请
    Systems and Methods for Data Write Loopback Based Timing Control 有权
    基于数据写环回的时序控制系统与方法

    公开(公告)号：US20120275278A1

    公开(公告)日：2012-11-01

    申请号：US13096873

    申请日：2011-04-28

    Applicant: Ross S. Wilson

    Inventor： Ross S. Wilson

    IPC: G11B5/02 ,  G11B13/04

    CPC classification number: G11B13/04 ,  G11B5/02 ,  G11B20/10009 ,  G11B2005/0021

    Abstract: Various embodiments of the present invention provide systems and methods for data writing. As an example, a heat assisted loopback circuit is discussed that includes: a read circuit, a magnetic write circuit, a heat write circuit, and a loopback circuit. The read circuit is operable to sense data from a storage medium, and to provide the sensed data as a read output. The magnetic write circuit is operable to provide a write output corresponding to an excitation signal of a write head. The heat write circuit is operable to provide a heat output corresponding to an excitation signal of a heat source. The loopback circuit is operable to selectively couple a derivative of the heat output to the read output and to selectively couple a derivative of the write output to the read output.

    Abstract translation: 本发明的各种实施例提供了用于数据写入的系统和方法。 作为示例，讨论了包括读取电路，磁性写入电路，加热写入电路和环回电路的热辅助回路电路。 读取电路可操作以感测来自存储介质的数据，并将所感测的数据提供为读取输出。 磁写入电路可操作以提供与写入头的激励信号相对应的写入输出。 热写电路可操作以提供对应于热源的激励信号的热输出。 环回电路可操作以选择性地将热输出的导数耦合到读输出并选择性地将写输出的导数耦合到读输出。

    Magnetic recording device, magnetic recording method, and magnetic storage medium
    94.
    发明授权
    Magnetic recording device, magnetic recording method, and magnetic storage medium 失效
    磁记录装置，磁记录方法和磁存储介质

    公开(公告)号：US08300341B2

    公开(公告)日：2012-10-30

    申请号：US13043883

    申请日：2011-03-09

    Applicant: Akihiro Itakura ,  Masatoshi Sakurai ,  Kazuhito Shimomura

    Inventor： Akihiro Itakura ,  Masatoshi Sakurai ,  Kazuhito Shimomura

    IPC: G11B5/02

    CPC classification number: G11B5/5547 ,  B82Y10/00 ,  G11B5/02 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B2005/0005

    Abstract: According to one embodiment, a magnetic recording device based on shingled-write recording method comprises a magnetic storage medium, a recording head, and an actuator. The magnetic storage medium comprises dot rows wherein a phase shift is between adjacent rows. The recording head covers a predetermined number of dot rows of the magnetic storage medium and comprises an edge at one of the dot rows. The actuator configured to move a recording head by an amount equivalent to a dot row after recording is performed on one of the dot rows by the recording head.

    Abstract translation: 根据一个实施例，基于带状写入记录方法的磁记录装置包括磁存储介质，记录头和致动器。 磁存储介质包括其中相移在相邻行之间的点行。 记录头覆盖磁存储介质的预定数量的点行，并且包括位于其中一个点行的边缘。 通过记录头在一个点行上执行被配置为使记录头移动相当于记录后的点行的量的致动器。

    Near-field thermally assisted magnetic recording head and recording apparatus thereof
    95.
    发明授权
    Near-field thermally assisted magnetic recording head and recording apparatus thereof 有权
    近场热辅助磁记录头及其记录装置

    公开(公告)号：US08284636B2

    公开(公告)日：2012-10-09

    申请号：US12448262

    申请日：2007-12-10

    Applicant: Manabu Oumi ,  Masakazu Hirata ,  Majung Park

    Inventor： Manabu Oumi ,  Masakazu Hirata ,  Majung Park

    IPC: G11B11/00

    CPC classification number: G11B5/02 ,  G11B5/3116 ,  G11B5/314 ,  G11B11/10536 ,  G11B11/10554 ,  G11B11/1058 ,  G11B2005/0002 ,  G11B2005/0021

    Abstract: A recording head has a conical tip disposed at a distal end thereof configured to oppose a surface of a medium. The conical tip has an opening for generating near-field light and a side surface forming at least a part of an edge portion of the conical tip surrounding the opening. A magnetic recording element generates magnetization inversion in a minute area on the surface of the medium which is heated by application of the near-field light. The magnetic recording element has a main magnetic pole, a secondary magnetic pole, and a dielectric film arranged between the main and secondary magnetic poles. The main magnetic pole comprises a thin film arranged on side surface of the conical tip for providing a magnetic field to the surface of the medium in a substantially vertical direction. The secondary magnetic pole is arranged on a surface of the conical tip opposite to the side surface thereof for absorbing a part of the magnetic field provided from the main magnetic pole.

    Abstract translation: 记录头具有设置在其远端处的锥形末端，其构造成与介质的表面相对。 锥形尖端具有用于产生近场光的开口和形成围绕开口的锥形末端的边缘部分的至少一部分的侧表面。 磁记录元件在通过施加近场光加热的介质的表面上的微小区域中产生磁化反转。 磁记录元件具有主磁极，次磁极和布置在主磁极和次磁极之间的电介质膜。 主磁极包括布置在锥形尖端的侧表面上的薄膜，用于在基本上垂直的方向上向介质的表面提供磁场。 次级磁极设置在与其侧表面相对的锥形尖端的表面上，用于吸收从主磁极提供的磁场的一部分。

    Hard disk apparatus and driving method therefor
    96.
    发明授权
    Hard disk apparatus and driving method therefor 有权
    硬盘装置及其驱动方法

    公开(公告)号：US08279720B2

    公开(公告)日：2012-10-02

    申请号：US12805187

    申请日：2010-07-16

    Applicant: Motoi Kimura

    Inventor： Motoi Kimura

    IPC: G11B11/00

    CPC classification number: G11B5/02 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/10277 ,  G11B20/10296 ,  G11B2005/0005 ,  G11B2005/0021 ,  G11B2220/2516

    Abstract: Disclosed herein is a hard disk apparatus, including: a magnetic recording medium; a recording head adapted to record information on the magnetic recording medium; a semiconductor laser adapted to be controlled for light emission in a cycle of a recording clock to irradiate a light spot upon the magnetic recording medium to carry out thermal assistance in magnetic recording by the recording head; a laser driving circuit adapted to drive the semiconductor laser at a timing and with optical power in accordance with a light emission timing signal and a laser power controlling signal; and a controller adapted to set laser power in accordance with at least one of characteristics of the magnetic recording medium, semiconductor laser and recording head and output the laser power controlling signal to the laser driving circuit so that the laser power is adaptively varied.

    Abstract translation: 这里公开了一种硬盘装置，包括：磁记录介质; 记录头，适于在磁记录介质上记录信息; 半导体激光器，其适于被控制在记录时钟的周期中的发光，以将光点照射在磁记录介质上，以通过记录头进行磁记录的热辅助; 激光驱动电路，其适于根据发光定时信号和激光功率控制信号在定时和光功率下驱动所述半导体激光器; 以及控制器，其适于根据磁记录介质，半导体激光器和记录头的特性中的至少一个来设置激光功率，并将激光功率控制信号输出到激光驱动电路，使得激光功率自适应地变化。

    Magneto-optical device with an optically induced magnetization
    97.
    发明申请
    Magneto-optical device with an optically induced magnetization 有权
    具有光学感应磁化的磁光器件

    公开(公告)号：US20120207002A1

    公开(公告)日：2012-08-16

    申请号：US13506115

    申请日：2012-03-28

    Applicant: Esfir Z. Katsnelson ,  Mark M. Chervinsky

    Inventor： Esfir Z. Katsnelson ,  Mark M. Chervinsky

    IPC: G11B13/04 ,  G01Q60/50 ,  G02F1/09

    CPC classification number: G11B5/3932 ,  G11B5/02 ,  G11B5/70678 ,  G11B5/74 ,  G11B13/045 ,  G11B2005/0002 ,  G11C13/06

    Abstract: A magneto-optical device (MOD) with optically induced magnetization for use in magnetic field sensors as a magnetic element pinning a magnetization in a preferred direction of a ferromagnetic layer as well as a magnetic memory cell for magneto-optical recording. The MOD comprises the Mg—Mg—Co ferrite film deposited on a magnesium oxide (MgO) substrate. The ferrite film is illuminated at room temperature with a circularly polarized light (CPL) in a static magnetic H-field (about of 3 kOe) normal to the illuminated ferrite film surface. At certain (“writing”) combinations of H, sigma (CPL helicity), the long-lived optically induced magnetization with a unidirectional anisotropy, stable to a conventional demagnetization occurs. For readout of information, conventional magnetoresistive sensors and MFM can be used. To erase information, the ferrite film should be illuminated with two field-light combinations, other than “writing”, or annealed at temperature higher than 530 degrees C.

    Abstract translation: 具有用于磁场传感器的光学感应磁化的磁光装置（MOD）作为磁化元件固定在铁磁层的优选方向上的磁化以及用于磁光记录的磁存储单元。 MOD包括沉积在氧化镁（MgO）基底上的Mg-Mg-Co铁氧体膜。 铁氧体膜在与照射的铁氧体膜表面垂直的静磁场（约3kOe）中用室温下的圆偏振光（CPL）照射。 在某些（“写入”）组合的H，西格玛（CPL螺旋度）下，发生具有单向各向异性的长寿命光学感应磁化，对常规退磁是稳定的。 为了读出信息，可以使用传统的磁阻传感器和MFM。 为了擦除信息，除了“写入”之外，铁氧体膜应该用两种场光组合进行照明，或者在高于530摄氏度的温度下退火。

    Method and apparatus for controlling head with spin-torque oscillator in a disk drive
    99.
    发明授权
    Method and apparatus for controlling head with spin-torque oscillator in a disk drive 有权
    用于在磁盘驱动器中用自旋扭矩振荡器控制磁头的方法和装置

    公开(公告)号：US08233230B2

    公开(公告)日：2012-07-31

    申请号：US12693201

    申请日：2010-01-25

    Applicant: Koji Yano ,  Kazuhito Shimomura ,  Akihiko Takeo ,  Masayuki Takagishi ,  Kenichiro Yamada

    Inventor： Koji Yano ,  Kazuhito Shimomura ,  Akihiko Takeo ,  Masayuki Takagishi ,  Kenichiro Yamada

    IPC: G11B21/02

    CPC classification number: G11B5/02 ,  G11B5/314 ,  G11B2005/001 ,  G11B2005/0024

    Abstract: According to one embodiment, a disk drive has a magnetic disk and a magnetic head having a spin-torque oscillator. The disk drive further has a head amplifier IC configured to supply a write signal and a drive signal to the magnetic head. The write signal corresponds to write data. The drive signal is supplied to generate a high-frequency magnetic field. The head amplifier IC continuously supplies a drive signal of normal level to the spin-torque oscillator, and supplies a drive signal of high level higher than the normal level, only for a prescribed time after the polarity inversion of the write signal.

    Abstract translation: 根据一个实施例，盘驱动器具有磁盘和具有自旋扭矩振荡器的磁头。 磁盘驱动器还具有被配置为向磁头提供写信号和驱动信号的磁头放大器IC。 写入信号对应于写入数据。 提供驱动信号以产生高频磁场。 头放大器IC连续向自旋转矩振荡器提供正常电平的驱动信号，并且在写入信号的极性反转之后的规定时间内提供高于正常电平的高电平的驱动信号。

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